APA Format
World Health Organization (WHO) . (). Planning and organization of geriatric services, TRS.548. : Geneva WHO 1974
MLA Format
World Health Organization (WHO) . Planning and organization of geriatric services, TRS.548. : Geneva WHO 1974,
Australian/Harvard Format
World Health Organization (WHO) . . Planning and organization of geriatric services, TRS.548. Geneva WHO 1974, 
Warning: These citations may not always be 100% accurate.