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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Geographic Society (United States). Cartographic Division, Melvin M. Payne, Melville Bell Grosvenor, Gilbert M. Grosvenor, William T. Peele, और David W. Cook. Central America [cartographic Material]. Washington, D.C: The Society, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Geographic Society (United States). Cartographic Division, et al. Central America [cartographic Material]. The Society, 1973.
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