APA Format
World Health Organization (WHO) . (). Children at work: special health risks, TRS.756. : Geneva WHO 1987
MLA Format
World Health Organization (WHO) . Children at work: special health risks, TRS.756. : Geneva WHO 1987,
Australian/Harvard Format
World Health Organization (WHO) . . Children at work: special health risks, TRS.756. Geneva WHO 1987, 
Warning: These citations may not always be 100% accurate.