A basic source could be found in the simple creeds of Christendom such as the Apostels Creed:
I believe in God the Father Almighty, [Isaiah 44:6; 45:5]
and in Jesus Christ [Luke 2:11; John 20:28],
His only Son [John 3:16, Proverbs 30:4]
Our Lord, [John 20:28, Rom 5:1]
Who was conceived by the Holy Spirit, [Luke 1:35]
born of the Virgin Mary, [Luke 1:27]
suffered under Pontius Pilate, Luke [23:23-25]
was crucified, [John 19:20; Acts 4:10; all 4 Gospels]
died, [1 Corinthians 15:3]
and was buried. [1 Corinthians 15:4]
He descended into Hell [1Peter 3:18-19];
the third day He rose again from the dead; [1 Corinthians 15:4]
He ascended into Heaven, [Luke 24:51, Acts 1:11]
and sits at the right hand of God, the Father almighty; [Hebrews 1:3]
from thence He shall come to judge the living and the dead. [2 Timothy 4:1; John 5:22]
I believe in the Holy Spirit, [John 15:26; 16:7-8, 13-14; Acts 5:3-4, 13:2 ]
the Church universal, [Galatians 3:26-29]
the communion of saints, [Revelation 19:14; Hebrews 10:25]
the forgiveness of sins, [Luke 7:48]
the resurrection of the body [1 Thessalonians 4:16; John 6:39]
and life everlasting. [John 10:28; 17:2-3]
and the others...
Deity of Christ [john 1:1-3, 14, titus 2:13]
Jesus is Messiah *(Christ) the Only Son of the Living God. [mt 16:16-17]
Christ death on the cross for sin is sufficient to take away all sin.[2john 2:2, col 2:13]
There is 1 God and revealed Himself as Father, Son and Holy Spirit. [titus 2:13, acts5 :3-4, 1pet 1:2]
God *(Creator) Created all things *(creation) [john 1:3, acts 17:24]
There is 1 faith [eph 4:5]
There is 1 Lord [eph 4:5]
There is 1 baptism [eph 4:5, 1corth 12:13]
Salvation is by grace, through faith, in Jesus Christ alone, and not of works. [acts:4:12, eph 2:8-9]
I do not know if the SDA reflects or reconizes such a source of information, *(Christian creeds) but the refences as given are found in the bible. These are not "common beliefs" but are the essentials of the Christian Faith. There are a slew of secondary doctrines that are not essential but rather the Christian community may debate amongst itself without division, *(1corth 11:18-20) but unforntually has not always been the case.
The essentials are to be "agreed on" to call oneself a "Christian." If any of the essentials are denied then one have created another Jesus. [2corth 11:4] Call it "exclusive" but one cannot deny the person, and nature and Work of the focus of the entirity of the bible, namely Jesus Christ, and say "im a Christian." *(truthfully)