APA (7th ed.) Zitazioa
Hawking, S. W. The Universe in a Nutshell. Bantam Books.
Chicago Style (17th ed.) Zitazioa
Hawking, Stephen W. The Universe in a Nutshell. Nueva York, EUA: Bantam Books.
MLA (9th ed.) Zitazioa
Hawking, Stephen W. The Universe in a Nutshell. Bantam Books.
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