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.
Precaución: Estas citas no son 100% exactas.