APA aipamena

(1996). American government: Principles and practices. USA: McGraw-Hill.

Chicago Style aipamena

American Government: Principles and Practices. USA: McGraw-Hill, 1996.

MLA aipamena

American Government: Principles and Practices. USA: McGraw-Hill, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.