APA Format
World Health Organization (WHO) . (). The etiology and prevention of dental caries, TRS.494. : Geneva WHO 1972
MLA Format
World Health Organization (WHO) . The etiology and prevention of dental caries, TRS.494. : Geneva WHO 1972,
Australian/Harvard Format
World Health Organization (WHO) . . The etiology and prevention of dental caries, TRS.494. Geneva WHO 1972, 
Warning: These citations may not always be 100% accurate.