Cita APA

Single, E., & Single, E. (2003). International guidelines for estimating the costs of substance abuse (2. edition.). Switzerland: World Health Organization.

Citación estilo Chicago

Single, Eric, y Eric Single. International Guidelines for Estimating the Costs of Substance Abuse. 2. edition. Switzerland: World Health Organization, 2003.

Cita MLA

Single, Eric, y Eric Single. International Guidelines for Estimating the Costs of Substance Abuse. 2. edition. Switzerland: World Health Organization, 2003.