(1972). Third Conference on Prostaglandins in Fertility Control. World Health Organization.
Cita Chicago (17th ed.)Third Conference on Prostaglandins in Fertility Control. Stockholm: World Health Organization, 1972.
Cita MLA (9th ed.)Third Conference on Prostaglandins in Fertility Control. World Health Organization, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.