APA Format
World Health Organization (WHO) . (). Tri-n-butyl phosphate. : Geneva WHO 1991
MLA Format
World Health Organization (WHO) . Tri-n-butyl phosphate. : Geneva WHO 1991,
Australian/Harvard Format
World Health Organization (WHO) . . Tri-n-butyl phosphate. Geneva WHO 1991, 
Warning: These citations may not always be 100% accurate.