Library of Congress. Federal Research Division, Worden, R. L., & Savada, A. M. (1991). Mongolia: A country study (2nd ed.). For sale by the Supt. of Docs., U.S. G.P.O..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLibrary of Congress. Federal Research Division, Robert L. Worden, और Andrea Matles Savada. Mongolia: A Country Study. 2nd ed. Washington, D.C.: For sale by the Supt. of Docs., U.S. G.P.O., 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLibrary of Congress. Federal Research Division, et al. Mongolia: A Country Study. 2nd ed. For sale by the Supt. of Docs., U.S. G.P.O., 1991.
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