APA Format
World Health Organization (WHO) . (). Amoebiasis, TRS.421. : Geneva WHO 1969
MLA Format
World Health Organization (WHO) . Amoebiasis, TRS.421. : Geneva WHO 1969,
Australian/Harvard Format
World Health Organization (WHO) . . Amoebiasis, TRS.421. Geneva WHO 1969, 
Warning: These citations may not always be 100% accurate.