Discovering the Spirit In the Trinity
Discusses how the early Church grew into a conviction about the Holy Spirit as God.
http://www.spirithome.com/histtrin.html

The Trinity
Presents the doctrine of the Trinity from a Christian Neoplatonic perspective.
http://www.observations.net/trinity.html

A Brief Introduction to Trinitarian Faith
Explores the nature of the Trinity, and puts forth Thomistic arguments that the doctrine of One God in three persons is not polytheistic.
http://www.abortionessay.com/files/Trinitarian.html

The Trinity - A Short Exposition
Dr. Francis J. Beckwith of the University of Nevada expounds on the doctrine of one God in three persons.
http://answering-islam.org.uk/Trinity/beckwith.html

Because ...
Provides perspective and scriptural references for the role of the Father, the Son and the Holy Spirit.
http://earth.prohosting.com/wesb/

Jesus Religion
A critical examination of the traditional church and Christian doctrine.
http://www.jesusreligion.com/

Trinity-God in 3 Persons
An explanation of the Trinity with quotes from the early Church fathers.
http://www.afcministry.com/Trinity_Doctrine.htm

On the Incarnation
Writings by Athanasius, the 4th century A.D. bishop of Alexandria, defending the Christology of the Council of Nicaea.
http://www.ccel.org/ccel/athanasius/incarnation.html

Triune God
Presents the writings of Witness Lee and Watchman Nee on the Trinity.
http://www.triunegod.org/

GodIn3Persons.com
Essays and links on the doctrine of the Trinity.
http://www.godin3persons.com/

A Quaker Understanding of Jesus Christ
An exploration of the Friends (Quaker) understanding of Jesus Christ by Arthur O. Roberts, George Fox University, Newberg, Oregon, USA. Part 1 in a series of 4.
http://www.quakerinfo.com/quak_jc1.shtml

On the Trinity
Augustine's writings on the Trinity.
http://www.ccel.org/ccel/schaff/npnf103.iv.i.html