Cita APA (7a ed.)

Walker, S., & Katz, C. M. (2002). The police in America: An introduction (4. ed.). Mc-Graw-Hill.

Cita Chicago Style (17a ed.)

Walker, Samuel, y Charles M. Katz. The Police in America: An Introduction. 4. ed. Boston [u.a.]: Mc-Graw-Hill, 2002.

Cita MLA (9a ed.)

Walker, Samuel, y Charles M. Katz. The Police in America: An Introduction. 4. ed. Mc-Graw-Hill, 2002.