Scripture references:
John 1:1–14 – “The Word became flesh…” (Jesus as the incarnate Word)
Hebrews 1:1–3 – “In these last days he has spoken to us by his Son…”
John 14:9 – “Whoever has seen me has seen the Father.”
1 Corinthians 2:10–12 – The Spirit reveals what is from God.
John 15:26 – The Spirit proceeds from the Father and bears witness about the Son.
Matthew 28:19 – Baptizing in the name of the Father, Son, and Holy Spirit.
Deuteronomy 6:4 – “The Lord is one.”
John 17:3 – “This is eternal life: that they know you… and Jesus Christ whom you have sent.”
Philippians 3:8–10 – “That I may know him and the power of his resurrection…”
John 10:14–15 – “I know my own and my own know me… just as the Father knows me…”
2 Corinthians 4:6 – “God… has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ.”

Creed and Confession references from PCUSA:

A Brief Statement of Faith (1983)
“In life and in death we belong to God… We trust in Jesus Christ, fully human, fully God…”
“We trust in God the Holy Spirit, everywhere the giver and renewer of life… who… calls women and men to all ministries of the Church.”

Confession of 1967
§9.07–9.10 – Emphasizes Christ as the self-revelation of God and the center of divine truth.
§9.08 – “The new life takes shape in a community in which men know that God loves and accepts them…”

Westminster Confession of Faith (1647)
Chapter 1.1 – “It pleased the Lord… to reveal himself…”
Chapter 2.3 – “In the unity of the Godhead there be three persons… the Father, the Son, and the Holy Ghost.”
Chapter 8.1 – “It pleased God… to choose and ordain the Lord Jesus… the Mediator between God and man…”

Heidelberg Catechism (1563)
Q&A 25 – “Since there is but one God, why do you speak of three: Father, Son, and Holy Spirit?”