APA Format
World Health Organization (WHO) . (). Energy and protein requirments, TRS.522. : Geneva FAO/WHO 1973
MLA Format
World Health Organization (WHO) . Energy and protein requirments, TRS.522. : Geneva FAO/WHO 1973,
Australian/Harvard Format
World Health Organization (WHO) . . Energy and protein requirments, TRS.522. Geneva FAO/WHO 1973, 
Warning: These citations may not always be 100% accurate.