APA Format
World Health Organization (WHO) . (). Educational imperatives for oral health personnel: change of decay?, TRS.794. : Geneva WHO 1990
MLA Format
World Health Organization (WHO) . Educational imperatives for oral health personnel: change of decay?, TRS.794. : Geneva WHO 1990,
Australian/Harvard Format
World Health Organization (WHO) . . Educational imperatives for oral health personnel: change of decay?, TRS.794. Geneva WHO 1990, 
Warning: These citations may not always be 100% accurate.