APA Format
World Health Organization (WHO) . (). Endocrine regulation of human gestation, TRS.471. : Geneva WHO 1971
MLA Format
World Health Organization (WHO) . Endocrine regulation of human gestation, TRS.471. : Geneva WHO 1971,
Australian/Harvard Format
World Health Organization (WHO) . . Endocrine regulation of human gestation, TRS.471. Geneva WHO 1971, 
Warning: These citations may not always be 100% accurate.