Cita APA (7a ed.)

Hirs, W. M. (1971). Drugs in Nederland (2. druk.). Brand.

Cita Chicago Style (17a ed.)

Hirs, W. M. Drugs in Nederland. 2. druk. Bussum: Brand, 1971.

Cita MLA (8a ed.)

Hirs, W. M. Drugs in Nederland. 2. druk. Brand, 1971.