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. The MacMillan Company, 1941.

MLA (8th ed.) Citation

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

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