Oneness Pentecostalism: A History of the Jesus Name Movement. Bellflower, CA: International Pentecostal Church, 2004.
Christianity without the Cross: A History of Salvation in Oneness Pentecostalism. Parkland, FL: Universal Publishers, 2003.
I Am: A Oneness Pentecostal Christology. Hazelwood, MO: Word Aflame Press Academic, 2009.
With Water and Spirit: A History of Black Apostolic Denominations in the U.S. Washington, DC: Spirit Press, 1980.
The Identity of Jesus Christ, rev. ed. Addis Ababa: Privately published, 2010.
Streams of Grace: A History of the Apostolic Church of Pentecost of Canada. Edmonton, AB: New Leaf Works, 2006.