Lua APA (7ú heag.)
Olford, S. F., & Olford, D. L. (2007). The Secret of soul winning. B & H Publishing Group.
Lua i Stíl Chicago (17ú heag.)
Olford, Stephen F., agus David L. Olford. The Secret of Soul Winning. Nashville, Tenn.: B & H Publishing Group, 2007.
Lua MLA (9ú heag.)
Olford, Stephen F., agus David L. Olford. The Secret of Soul Winning. B & H Publishing Group, 2007.
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