APA (7th ed.) Zitazioa
Hughes, D. Free to Fly: A User's Guide to the Imagination. Scott, Foresman and Company.
Chicago Style (17th ed.) Zitazioa
Hughes, Dean. Free to Fly: A User's Guide to the Imagination. Glenview, EUA: Scott, Foresman and Company.
MLA (9th ed.) Zitazioa
Hughes, Dean. Free to Fly: A User's Guide to the Imagination. Scott, Foresman and Company.
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