APA (7th ed.) Zitazioa
Heck, G. W. (2006). Charlemagne, Muhammad, and the Arab roots of capitalism. De Gruyter.
Chicago Style (17th ed.) Zitazioa
Heck, Gene W. Charlemagne, Muhammad, and the Arab Roots of Capitalism. Berlin ; New York: De Gruyter, 2006.
MLA (9th ed.) Zitazioa
Heck, Gene W. Charlemagne, Muhammad, and the Arab Roots of Capitalism. De Gruyter, 2006.
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