Jackson, M. (1981). Vaginal contraception. G. K. Hall Medical.
Cita Chicago (17th ed.)Jackson, Marianne. Vaginal Contraception. G. K. Hall Medical, 1981.
Cita MLA (9th ed.)Jackson, Marianne. Vaginal Contraception. G. K. Hall Medical, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.