APA Format
World Health Organization (WHO) . (). Parasitic zoonoses, TRS.637. : Geneva WHO 1979
MLA Format
World Health Organization (WHO) . Parasitic zoonoses, TRS.637. : Geneva WHO 1979,
Australian/Harvard Format
World Health Organization (WHO) . . Parasitic zoonoses, TRS.637. Geneva WHO 1979, 
Warning: These citations may not always be 100% accurate.