Humboldt, A. v., & Beck, H. (1987). Ansichten der Natur. Bd. 1 u. 2. Wiss. Buchges..
Chicago Style (17th ed.) CitationHumboldt, Alexander von, and Hanno Beck. Ansichten Der Natur. Bd. 1 U. 2. Darmstadt: Wiss. Buchges., 1987.
MLA (8th ed.) CitationHumboldt, Alexander von, and Hanno Beck. Ansichten Der Natur. Bd. 1 U. 2. Wiss. Buchges., 1987.
Warning: These citations may not always be 100% accurate.