APA
World Health Organization, United Nations International Drug Control Programme & WHO/UNDCP Global Initiative on Primary Prevention of Substance Abuse. (2003). Substance use in Southern Africa : knowledge, attitudes, practices and opportunities for intervention : summary of baseline assessments in the Republic of South Africa, the United Republic of Tanzania and the Republic of Zambia. Geneva: World Health Organization.
Chicago
World Health Organization, United Nations International Drug Control Programme and WHO/UNDCP Global Initiative on Primary Prevention of Substance Abuse. 2003. Substance use in Southern Africa : knowledge, attitudes, practices and opportunities for intervention : summary of baseline assessments in the Republic of South Africa, the United Republic of Tanzania and the Republic of Zambia. Geneva: World Health Organization.
Harvard
World Health Organization, United Nations International Drug Control Programme and WHO/UNDCP Global Initiative on Primary Prevention of Substance Abuse. (2003). Substance use in Southern Africa : knowledge, attitudes, practices and opportunities for intervention : summary of baseline assessments in the Republic of South Africa, the United Republic of Tanzania and the Republic of Zambia. Geneva: World Health Organization.
MLA
World Health Organization, United Nations International Drug Control Programme and WHO/UNDCP Global Initiative on Primary Prevention of Substance Abuse. Substance use in Southern Africa : knowledge, attitudes, practices and opportunities for intervention : summary of baseline assessments in the Republic of South Africa, the United Republic of Tanzania and the Republic of Zambia. Geneva: World Health Organization. 2003.