Cita APA (7th ed.)
Semm, K., & Mettler, L. (1981). Human Reproduction: Proceedings of 3rd world congress Berlin, March 22-26, 1981. Excerpta medica.
Cita Chicago (17th ed.)
Semm, Kurt, i L. Mettler. Human Reproduction: Proceedings of 3rd World Congress Berlin, March 22-26, 1981. Amsterdam [usw.]: Excerpta medica, 1981.
Cita MLA (9th ed.)
Semm, Kurt, i L. Mettler. Human Reproduction: Proceedings of 3rd World Congress Berlin, March 22-26, 1981. Excerpta medica, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.