Cita APA (7a ed.)

Wulff-Nienhüser, M., & Seitz, N. (1991). Environmental crime: Present status and future trends. Police research in the Federal Republic of Germany, 189-198.

Cita Chicago Style (17a ed.)

Wulff-Nienhüser, M., y N. Seitz. "Environmental Crime: Present Status and Future Trends." Police Research in the Federal Republic of Germany 1991: 189-198.

Cita MLA (9a ed.)

Wulff-Nienhüser, M., y N. Seitz. "Environmental Crime: Present Status and Future Trends." Police Research in the Federal Republic of Germany, 1991, pp. 189-198.