APA (7th ed.) Zitazioa
Rod, S. J. An Introduction To Stamp Collecting.
Chicago Style (17th ed.) Zitazioa
Rod, Steven J. An Introduction To Stamp Collecting.
MLA (9th ed.) Zitazioa
Rod, Steven J. An Introduction To Stamp Collecting.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.