World Health Organization, Regional Office for South-East Asia. (2000). Essential drugs for primary health care: A manual for health care workers. World Health Organization, Regional Office for South-East Asia.

World Health Organization, Regional Office for South-East Asia. Essential Drugs for Primary Health Care: A Manual for Health Care Workers. New Delhi, India: World Health Organization, Regional Office for South-East Asia, 2000.

World Health Organization, Regional Office for South-East Asia. Essential Drugs for Primary Health Care: A Manual for Health Care Workers. World Health Organization, Regional Office for South-East Asia, 2000.