APA-referens (7:e uppl.)

Willke, J. C. (1984). Slavery and abortion (ed.). Hayes Publishing company.

Chicago-referens (17:e uppl.)

Willke, J C. Slavery and Abortion. ed. Cincinnati: Hayes Publishing company, 1984.

MLA-referens (9:e uppl.)

Willke, J C. Slavery and Abortion. ed. Hayes Publishing company, 1984.