Cita APA (7th ed.)

Harkness, G. (1957). Understanding the christian faith. Abingdon-Cokebury.

Cita Chicago (17th ed.)

Harkness, Georgia. Understanding the Christian Faith. New York: Abingdon-Cokebury, 1957.

Cita MLA (9th ed.)

Harkness, Georgia. Understanding the Christian Faith. Abingdon-Cokebury, 1957.