APA aipamena

Samuel Walker, C. M. (2005). The police in american an introduction.

Chicago Style aipamena

Samuel Walker, Charles M.Katz. The Police in American an Introduction. 2005.

MLA aipamena

Samuel Walker, Charles M.Katz. The Police in American an Introduction. 2005.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.