APA (7th ed.) Zitazioa
(2007). GBS: My Sister's a Barista Starbucks. Marshall Cavendish Limited.
Chicago Style (17th ed.) Zitazioa
GBS: My Sister's a Barista Starbucks. Marshall Cavendish Limited, 2007.
MLA (9th ed.) Zitazioa
GBS: My Sister's a Barista Starbucks. Marshall Cavendish Limited, 2007.
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