Hansen, V. (2000). The open empire: A history of China to 1600. Norton.
Lua i Stíl Chicago (17ú heag.)Hansen, Valerie. The Open Empire: A History of China to 1600. New York: Norton, 2000.
Lua MLA (8ú heag.)Hansen, Valerie. The Open Empire: A History of China to 1600. Norton, 2000.
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