Cita APA (7a ed.)

Verthein, U., Raschke, P., & Kalke, J. (1995). Methadone therapy in Hamburg. European addiction research, 1(3), 99-105.

Cita Chicago Style (17a ed.)

Verthein, U., P. Raschke, y J. Kalke. "Methadone Therapy in Hamburg." European Addiction Research 1, no. 3 (1995): 99-105.

Cita MLA (8a ed.)

Verthein, U., et al. "Methadone Therapy in Hamburg." European Addiction Research, vol. 1, no. 3, 1995, pp. 99-105.