Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Zitierstil

Cowgill, G. L., & Yoffee, N. (1991). The collapse of ancient states and civilizations (2nd printing.). Tucson: The University of Arizona Press.

Chicago Zitierstil

Cowgill, George L., and Norman Yoffee. The Collapse of Ancient States and Civilizations. 2nd printing. Tucson: The University of Arizona Press, 1991.

MLA Zitierstil

Cowgill, George L., and Norman Yoffee. The Collapse of Ancient States and Civilizations. 2nd printing. Tucson: The University of Arizona Press, 1991.