APA Format
World Health Organization (WHO) . (). Arterial hypertention, TRS.628. : Geneva WHO 1978
MLA Format
World Health Organization (WHO) . Arterial hypertention, TRS.628. : Geneva WHO 1978,
Australian/Harvard Format
World Health Organization (WHO) . . Arterial hypertention, TRS.628. Geneva WHO 1978, 
Warning: These citations may not always be 100% accurate.