APA Format
World Health Organization (WHO) . (). Advances in methods of fertility regulation, TRS.527. : Geneva WHO 1973
MLA Format
World Health Organization (WHO) . Advances in methods of fertility regulation, TRS.527. : Geneva WHO 1973,
Australian/Harvard Format
World Health Organization (WHO) . . Advances in methods of fertility regulation, TRS.527. Geneva WHO 1973, 
Warning: These citations may not always be 100% accurate.