APA Format
World Health Organization (WHO) . (). Principles for the toxicological assessment of pesticide residues in food. : Geneva WHO 1990
MLA Format
World Health Organization (WHO) . Principles for the toxicological assessment of pesticide residues in food. : Geneva WHO 1990,
Australian/Harvard Format
World Health Organization (WHO) . . Principles for the toxicological assessment of pesticide residues in food. Geneva WHO 1990, 
Warning: These citations may not always be 100% accurate.