Cita APA (7a ed.)

Willke, J. (1990). Abortion: : questions et answers : revised'88 : revised'90 (ed. rev.). Hayes Publishing Company.

Cita Chicago Style (17a ed.)

Willke, J.C. Abortion: : Questions Et Answers : Revised'88 : Revised'90. ed. rev. Cincinnati: Hayes Publishing Company, 1990.

Cita MLA (9a ed.)

Willke, J.C. Abortion: : Questions Et Answers : Revised'88 : Revised'90. ed. rev. Hayes Publishing Company, 1990.