Cita APA

Wilson, M. B. (1993). Natural family planning. Cheap, effective, and free of side effects.

Chicago Style Citation

Wilson, M B. Natural Family Planning. Cheap, Effective, and Free of Side Effects. 1993.

Cita MLA

Wilson, M B. Natural Family Planning. Cheap, Effective, and Free of Side Effects. 1993.

Atenció: Aquestes cites poden no estar 100% correctes.