APA aipamena

Campbell, T. J. (1901). The Only True American School System. New York.

Chicago Style aipamena

Campbell, Thomas J. The Only True American School System. New York, 1901.

MLA aipamena

Campbell, Thomas J. The Only True American School System. New York, 1901.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.