APA (7th ed.) Citation

Mackay, J. A. (1941). A preface to Christian Theology. The Macmillan Company.

Chicago Style (17th ed.) Citation

Mackay, John A. A Preface to Christian Theology. New York: The Macmillan Company, 1941.

MLA (9th ed.) Citation

Mackay, John A. A Preface to Christian Theology. The Macmillan Company, 1941.