Cosmos : A Sketch or a Physical Description of the Universe

MLA

Von Humboldt, Alexander. Cosmos : A Sketch Or a Physical Description of the Universe. s.l.: Harper & Brothers, 1858.

APA

Von Humboldt, A. (1858). Cosmos : A Sketch or a Physical Description of the Universe. s.l.: Harper & Brothers.

Chicago

Von Humboldt, Alexander Cosmos : A Sketch Or a Physical Description of the Universe. s.l.: Harper & Brothers, 1858.