APA (7th ed.) Citation

Humboldt, A. v., Bonpland, A., & Kunth, K. S. (1963). Voyage de Humboldt et Bonpland. J. Cramer : Hafner.

Chicago Style (17th ed.) Citation

Humboldt, Alexander von, Aimé Bonpland, and Karl Sigismund Kunth. Voyage De Humboldt Et Bonpland. Weinheim : New York: J. Cramer : Hafner, 1963.

MLA (8th ed.) Citation

Humboldt, Alexander von, et al. Voyage De Humboldt Et Bonpland. J. Cramer : Hafner, 1963.