Gaya APA

Greenberg, S, F. (2017). Frontline Policing in the 21st Century (1st ed.). Cham: Palgrave Macmilan.

Gaya MLA

Greenberg, Sheldon, F.. "Frontline Policing in the 21st Century". 1st ed. Cham: Palgrave Macmilan, 2017. E Book.