Cita APA (7a ed.)

Willke, J. C., & Willke, B. (1971). Handbook on abortion (2. printing revised.). Hiltz Publishing Co.

Cita Chicago Style (17a ed.)

Willke, J. C., y Barbara Willke. Handbook on Abortion. 2. printing revised. Cincinnati (Ohio): Hiltz Publishing Co, 1971.

Cita MLA (9a ed.)

Willke, J. C., y Barbara Willke. Handbook on Abortion. 2. printing revised. Hiltz Publishing Co, 1971.