Humboldt, F. E. A. (1852). Personal narrative of travels to the Equinoctial regions of America during the years 1799-1804. Henry G. Bohn.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিHumboldt, Federico Enrique Alejandro. Personal Narrative of Travels to the Equinoctial Regions of America During the Years 1799-1804. London, England, United Kingdom: Henry G. Bohn, 1852.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিHumboldt, Federico Enrique Alejandro. Personal Narrative of Travels to the Equinoctial Regions of America During the Years 1799-1804. Henry G. Bohn, 1852.
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