APA Format
World Health Organization (WHO) . (). Maturation of fetal body systems: report of a WHO scientific group/WHO. : Geneva WHO 1974
MLA Format
World Health Organization (WHO) . Maturation of fetal body systems: report of a WHO scientific group/WHO. : Geneva WHO 1974,
Australian/Harvard Format
World Health Organization (WHO) . . Maturation of fetal body systems: report of a WHO scientific group/WHO. Geneva WHO 1974, 
Warning: These citations may not always be 100% accurate.