APA Format
World Health Organization (WHO) . (). Oral contraceptives and neoplasia, TRS.817. : Geneva WHO 1992
MLA Format
World Health Organization (WHO) . Oral contraceptives and neoplasia, TRS.817. : Geneva WHO 1992,
Australian/Harvard Format
World Health Organization (WHO) . . Oral contraceptives and neoplasia, TRS.817. Geneva WHO 1992, 
Warning: These citations may not always be 100% accurate.