Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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