APA-referens (7:e uppl.)

Vermeersch, A. (1932). What is marriage?: A catechism arranged according to the encyclical "Casti connubii" of Pope Pius XI. America Press.

Chicago-referens (17:e uppl.)

Vermeersch, A. What Is Marriage?: A Catechism Arranged According to the Encyclical "Casti Connubii" of Pope Pius XI. New York: America Press, 1932.

MLA-referens (8:e uppl.)

Vermeersch, A. What Is Marriage?: A Catechism Arranged According to the Encyclical "Casti Connubii" of Pope Pius XI. America Press, 1932.