APA (7th ed.) Citation

Botting, D. (1973). Humboldt and the cosmos (1. publ.). Harper & Row.

Chicago Style (17th ed.) Citation

Botting, Douglas. Humboldt and the Cosmos. 1. publ. New York [u.a.]: Harper & Row, 1973.

MLA (9th ed.) Citation

Botting, Douglas. Humboldt and the Cosmos. 1. publ. Harper & Row, 1973.