APA (7th ed.) Zitazioa
Portable Players in Australia. Euromonitor International Ltd.
Chicago Style (17th ed.) Zitazioa
Portable Players in Australia. Euromonitor International Ltd.
MLA (9th ed.) Zitazioa
Portable Players in Australia. Euromonitor International Ltd.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.