Cita APA (7a ed.)

Humboldt, A. v., & Williams, H. M. (1821). Personal Narrative of Travels to the Equinoctial Regions of the New Continent, during the years 1799-1804. Longman, Hurst, Rees Orme and Brown.

Cita Chicago Style (17a ed.)

Humboldt, Alexander von, y Helen Maria Williams. Personal Narrative of Travels to the Equinoctial Regions of the New Continent, During the Years 1799-1804. London: Longman, Hurst, Rees Orme and Brown, 1821.

Cita MLA (9a ed.)

Humboldt, Alexander von, y Helen Maria Williams. Personal Narrative of Travels to the Equinoctial Regions of the New Continent, During the Years 1799-1804. Longman, Hurst, Rees Orme and Brown, 1821.