GOD

Assemblies of God
1. THE ETERNAL GODHEAD: WE BELIEVE in the unity of the true and living God who is the eternal, self-existent one, who has revealed himself as one being in three persons - Father, Son and Holy Spirit, and who is the Creator and preserver of things visible and invisible - Deuteronomy 6:4; Mark 12:29; Matthew 28:19; Genesis 1:1; Psalm 86:9-10; Isaiah 43:10-11; John 1:1-3.

Baptist Union of Australia ( Statement of Beliefs as approved by 1979 Assembly)
The Nature and Unity of the Godhead
There is one God Who is eternal personal Spirit. He is infinite in power, wisdom, holiness and love. He is Triune in essential being and revealed to us as Father, Son and Holy Spirit.

Orthodox
We believe that God is One in substance and Triune in persons. We worship One God in Trinity, and Trinity in Unity, neither confusing the persons nor dividing the substance. Creation is the work in time of the Blessed Trinity. The world is not self-created, neither has it existed from eternity, but it is the product of the wisdom, the power, and the will of the One God in Trinity. God the Father is the prime cause of creation and God the Son and God the Holy Spirit took part in creation, God the Son perfecting creation and God the Holy Spirit vivifying creation.

Salvation Army
2. We believe that there is only one God who is infinitely perfect, the creator, preserver, and governor of all things, and who is the only proper object of religious worship.

Potters HouseThe One True God
The One true God has revealed Himself as the eternally self-existent, self-revealed "I AM"; and has further revealed Himself as embodying the principles of relationship and association. i.e.. as Father, Son and Holy Ghost. (Deuteronomy 6:4; Mark 12:29; Isaiah 43:10,11; Matthew 28:19; Galatians 3:20).

Presbyterian (Westminster Confession of Faith) Chapter II. Of God, and of the Holy Trinity.
I. There is but one only living and true God, who is infinite in being and perfection, a most pure spirit, invisible, without body, parts, or passions, immutable, immense, eternal, incomprehensible, almighty, most wise, most holy, most free, most absolute, working all things according to the counsel of his own immutable and most righteous will, for his won glory, most loving, gracious, merciful, long-suffering, abundant in goodness and truth, forgiving iniquity, transgression, and sin; the rewarder of them that diligently seek him; and withal most just and terrible in his judgments; hating all sin; and who will by no means clear the guilty.

II. God hath all life, glory, goodness, blessedness, in and of himself; and is alone in and unto himself all-sufficient, not standing in need of any creatures which he hath made, nor deriving any glory from them, but only manifesting his own glory in, by, unto, and upon them; he is the alone foundation of all being, of whom, through whom, and to whom, are all things; and hath most sovereign dominion over them, to do by them, for them, or upon them, whatsoever himself pleaseth. In his sight all things are open and manifest; his knowledge is infinite, infallible, and independent upon the creature; so as nothing is to him contingent or uncertain. He is most holy in all his counsels, in all his works, and in all his commands. To him is due from angels and men, and every other creature, whatsoever worship, service, or obedience he is pleased to require of them.

III. In the unity of the Godhead there be three Persons of one substance, power, and eternity: God the Father, God the Son, and God the Holy Ghost. The Father is of none, neither begotten nor proceeding; the Son is eternal begotten of the Father; the Holy Ghost eternally proceeding from the Father and the Son.

Scripture Union
(a) God and the human race
We hold that the Lord our God is one:
Father, Son and Holy Spirit, and that he fulfils his sovereign purposes
- in creation, revelation, redemption, judgement, and the coming of
his kingdom -
by calling out from the world a people united to himself and to each
other in love.