Dyfyniad APA

Dorn, N., Jepsen, J., & Savona, E. U. (1996). European drug policies and enforcement. Macmillan.

Dyfyniad Arddull Chicago

Dorn, Nicholas, Jorgen Jepsen, and Ernesto Ugo Savona. European Drug Policies and Enforcement. Houndsmill, Basingstoke, Hampshire: Macmillan, 1996.

Dyfyniad MLA

Dorn, Nicholas, et al. European Drug Policies and Enforcement. Macmillan, 1996.

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