APA (7th ed.) Zitazioa

Sykes, S. (1971). An introduction to christian theology today. John Knox Press.

Chicago Style (17th ed.) Zitazioa

Sykes, Stephen. An Introduction to Christian Theology Today. Atlanta: John Knox Press, 1971.

MLA (9th ed.) Zitazioa

Sykes, Stephen. An Introduction to Christian Theology Today. John Knox Press, 1971.