Palka, E. (2004). geographic perspectives: Afghanistan. New York: McGaw-Hill/Dushkin.
Trích dẫn kiểu ChicagoPalka, Eugene. Geographic Perspectives: Afghanistan. New York: McGaw-Hill/Dushkin, 2004.
MLA citiranjePalka, Eugene. Geographic Perspectives: Afghanistan. New York: McGaw-Hill/Dushkin, 2004.
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