Toenjes, C. (2019). On Patrol: Operational English for German Law Enforcement Officers (2., enhanced ed.). Vlg. für Polizeiwissenschaft.
Chicago-Zitierstil (17. Ausg.)Toenjes, Christopher. On Patrol: Operational English for German Law Enforcement Officers. 2., enhanced ed. Frankfurt [am Main]: Vlg. für Polizeiwissenschaft, 2019.
MLA-Zitierstil (8. Ausg.)Toenjes, Christopher. On Patrol: Operational English for German Law Enforcement Officers. 2., enhanced ed. Vlg. für Polizeiwissenschaft, 2019.
警告：這些引文格式不一定是100％准確.