Cita APA (7a ed.)

Humboldt, A. v., Dallas, W., & Otté, E. C. (1864). Cosmos a sketch of a physical description of the universe. G. Bohn.

Cita Chicago Style (17a ed.)

Humboldt, Alexander von, W. Dallas, y E. C. Otté. Cosmos a Sketch of a Physical Description of the Universe. London: G. Bohn, 1864.

Cita MLA (9a ed.)

Humboldt, Alexander von, et al. Cosmos a Sketch of a Physical Description of the Universe. G. Bohn, 1864.