Toenjes, C. (2019). On Patrol: Operational English for German Law Enforcement Officers (2., enhanced ed.). Vlg. für Polizeiwissenschaft.
Čikaški stil citiranja (17. izdanje)Toenjes, Christopher. On Patrol: Operational English for German Law Enforcement Officers. 2., enhanced ed. Frankfurt [am Main]: Vlg. für Polizeiwissenschaft, 2019.
MLA način citiranja (8. izdanje)Toenjes, Christopher. On Patrol: Operational English for German Law Enforcement Officers. 2., enhanced ed. Vlg. für Polizeiwissenschaft, 2019.
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