Cita APA

Humboldt, F. W. H. A. F. v. 1. (1901). Cosmos: A sketch of a physical description the universe. London, Sydney: G. Bell.

Citación estilo Chicago

Humboldt, Friedrich Wilhelm Heinrich Alexander Freiherr von 1769-1859. Cosmos: A Sketch of a Physical Description the Universe. London, Sydney: G. Bell, 1901.

Cita MLA

Humboldt, Friedrich Wilhelm Heinrich Alexander Freiherr von 1769-1859. Cosmos: A Sketch of a Physical Description the Universe. London, Sydney: G. Bell, 1901.