APA Format
World Health Organization (WHO) . (). Community health nursing, TRS.558. : Geneva WHO 1974
MLA Format
World Health Organization (WHO) . Community health nursing, TRS.558. : Geneva WHO 1974,
Australian/Harvard Format
World Health Organization (WHO) . . Community health nursing, TRS.558. Geneva WHO 1974, 
Warning: These citations may not always be 100% accurate.