APA (7th ed.) Zitazioa
Wallbank, T. Civilization: Past and present (6th ed.). Scott, Foreman and Co.
Chicago Style (17th ed.) Zitazioa
Wallbank, T.Walter. Civilization: Past and Present. 6th ed. California: Scott, Foreman and Co.
MLA (9th ed.) Zitazioa
Wallbank, T.Walter. Civilization: Past and Present. 6th ed. Scott, Foreman and Co.
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