APA

Collins D. J., Easton B., Harwood H. J., Lapsley H. M., Kopp P., Wilson E., Single E., World Health Organization. Department of Mental Health and Substance Dependence & International Symposium on Estimating the Economic and Social Costs of Substance Abuse (3rd : 2000 : Alberta C. (2003). International guidelines for estimating the costs of substance abuse. Geneva: World Health Organization.

Chicago

Collins David J, Easton Brian, Harwood Henrick J, Lapsley Helen M, Kopp Pierre, Wilson Ernesto, Single Eric, World Health Organization. Department of Mental Health and Substance Dependence and International Symposium on Estimating the Economic and Social Costs of Substance Abuse (3rd : 2000 : Alberta Canada). 2003. International guidelines for estimating the costs of substance abuse. Geneva: World Health Organization.

Harvard

Collins D. J., Easton B., Harwood H. J., Lapsley H. M., Kopp P., Wilson E., Single E., World Health Organization. Department of Mental Health and Substance Dependence and International Symposium on Estimating the Economic and Social Costs of Substance Abuse (3rd : 2000 : Alberta C. (2003). International guidelines for estimating the costs of substance abuse. Geneva: World Health Organization.

MLA

Collins David J, Easton Brian, Harwood Henrick J, Lapsley Helen M, Kopp Pierre, Wilson Ernesto, Single Eric, World Health Organization. Department of Mental Health and Substance Dependence and International Symposium on Estimating the Economic and Social Costs of Substance Abuse (3rd : 2000 : Alberta Canada). International guidelines for estimating the costs of substance abuse. Geneva: World Health Organization. 2003.