APA-referens (7:e uppl.)
Glenn, P. J. (1980). Apologetics. A philosophic defense and explanation of the catholic religion (1a ed.). Tan books and publishers, inc.
Chicago-referens (17:e uppl.)
Glenn, Paul J. Apologetics. A Philosophic Defense and Explanation of the Catholic Religion. 1a ed. Tan books and publishers, inc, 1980.
MLA-referens (9:e uppl.)
Glenn, Paul J. Apologetics. A Philosophic Defense and Explanation of the Catholic Religion. 1a ed. Tan books and publishers, inc, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.