Caulkins, Jonathan P., Carolyn C. Coulson, Christina Farber, et al. "Marijuana Legalization: Certainty, Impossibility, Both, or Neither?" Journal of Drug Policy Analysis, 5.1 (2012): 1-27. Retrieved 19 May. 2013, from doi:10.1515/1941-2851.1035

Caulkins, J., Coulson, C., Farber, C., et al. (2012). Marijuana Legalization: Certainty, Impossibility, Both, or Neither?. Journal of Drug Policy Analysis, 5(1), pp. 1-. Retrieved 19 May. 2013, from doi:10.1515/1941-2851.1035

Caulkins, Jonathan P., Carolyn C. Coulson, Christina Farber, et al. 2012. Marijuana Legalization: Certainty, Impossibility, Both, or Neither?. Journal of Drug Policy Analysis. 5(1): 1-. Retrieved 19 May. 2013, from doi:10.1515/1941-2851.1035