Boehm, R. G. (2002). Geography: The World and its people. New York: Glencoe/McGraw-Hill.
Chicago Stili AlıntıBoehm, Ricchard G. Geography: The World and Its People. New York: Glencoe/McGraw-Hill, 2002.
MLA AlıntıBoehm, Ricchard G. Geography: The World and Its People. New York: Glencoe/McGraw-Hill, 2002.
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