Ketchum, R. M., & Catton, B. (1973). The American heritage book of great historic places. New York: American Heritage.
Παραπομπή Chicago StyleKetchum, Richard M., and Bruce Catton. The American Heritage Book of Great Historic Places. New York: American Heritage, 1973.
Παραπομπή MLAKetchum, Richard M., and Bruce Catton. The American Heritage Book of Great Historic Places. New York: American Heritage, 1973.
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