APA (7th ed.) Zitazioa
Seel, G. E. (2012). King John: An underrated king. Anthem Press.
Chicago Style (17th ed.) Zitazioa
Seel, G. E. King John: An Underrated King. London ; New York: Anthem Press, 2012.
MLA (9th ed.) Zitazioa
Seel, G. E. King John: An Underrated King. Anthem Press, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.