APA (7th ed.) Zitazioa
(1993). Gale directory of publications and broadcast media: Update. Gale Research Inc..
Chicago Style (17th ed.) Zitazioa
Gale Directory of Publications and Broadcast Media: Update. Detroit, Michigan: Gale Research Inc., 1993.
MLA (9th ed.) Zitazioa
Gale Directory of Publications and Broadcast Media: Update. Gale Research Inc., 1993.
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