Cita APA (7a ed.)

Díez Ripollés, J. L. (1989). Current trends on the works of the European Parliament with regard to narcotic drugs. Drug policies in Western Europe, 21-28.

Cita Chicago Style (17a ed.)

Díez Ripollés, José Luis. "Current Trends on the Works of the European Parliament with Regard to Narcotic Drugs." Drug Policies in Western Europe 1989: 21-28.

Cita MLA (9a ed.)

Díez Ripollés, José Luis. "Current Trends on the Works of the European Parliament with Regard to Narcotic Drugs." Drug Policies in Western Europe, 1989, pp. 21-28.