APA-viite (7. p.)

Heydt, H. J. (1967). A comparison of world religions. Christian Literature Crusade.

Chicago-viite (17. p.)

Heydt, Henry J. A Comparison of World Religions. Fort Washington: Christian Literature Crusade, 1967.

MLA-viite (9. p.)

Heydt, Henry J. A Comparison of World Religions. Christian Literature Crusade, 1967.