Cita APA (7a ed.)

Díez Ripollés, J. L. (1989). Principles of a new drug policy in Western Europe from a Spanish point of view. Drug policies in Western Europe, 321-341.

Cita Chicago Style (17a ed.)

Díez Ripollés, José Luis. "Principles of a New Drug Policy in Western Europe from a Spanish Point of View." Drug Policies in Western Europe 1989: 321-341.

Cita MLA (9a ed.)

Díez Ripollés, José Luis. "Principles of a New Drug Policy in Western Europe from a Spanish Point of View." Drug Policies in Western Europe, 1989, pp. 321-341.