Cita APA (7th ed.)
Mackay, J. A. (1941). A preface to christian theology. Macmillan.
Cita Chicago (17th ed.)
Mackay, John A. A Preface to Christian Theology. New York: Macmillan, 1941.
Cita MLA (9th ed.)
Mackay, John A. A Preface to Christian Theology. Macmillan, 1941.
Atenció: Aquestes cites poden no estar 100% correctes.