Dyfyniad APA

Single, E., & ...[et al.]. (2003). International guidelines for estimating the costs of substance abuse. World Health Organisation.

Dyfyniad Arddull Chicago

Single, Eric, and ...[et al.]. International Guidelines for Estimating the Costs of Substance Abuse. Geneva: World Health Organisation, 2003.

Dyfyniad MLA

Single, Eric, and ...[et al.]. International Guidelines for Estimating the Costs of Substance Abuse. World Health Organisation, 2003.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.