APA (7th ed.) Citation

Heick, O. W. (1966). A history of Christian thought. Fortress Press.

Chicago Style (17th ed.) Citation

Heick, Otto W. A History of Christian Thought. Philadelphia: Fortress Press, 1966.

MLA (8th ed.) Citation

Heick, Otto W. A History of Christian Thought. Fortress Press, 1966.

Warning: These citations may not always be 100% accurate.