Παραπομπή σε μορφή APA (7η εκδ.)

Duby, G., & Clarke, H. B. (1992). The early growth of the European economy: Warriors and peasants from the seventh to the twelfth century. Cornell University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Duby, Georges, και Howard B. Clarke. The Early Growth of the European Economy: Warriors and Peasants from the Seventh to the Twelfth Century. New York: Cornell University Press, 1992.

Παραπομπή σε μορφή MLA (9th εκδ.)

Duby, Georges, και Howard B. Clarke. The Early Growth of the European Economy: Warriors and Peasants from the Seventh to the Twelfth Century. Cornell University Press, 1992.