APA (7th ed.) Citation

Walker, W. (1968). Great men of the Christian church. Books for Libraries Press.

Chicago Style (17th ed.) Citation

Walker, Williston. Great Men of the Christian Church. Freeport, N.Y.: Books for Libraries Press, 1968.

MLA (9th ed.) Citation

Walker, Williston. Great Men of the Christian Church. Books for Libraries Press, 1968.

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