APA (7th ed.) Citation

Humboldt, W. v. (1981). Werke. Werke in 5 Bänden.

Chicago Style (17th ed.) Citation

Humboldt, Wilhelm von. "Werke." Werke in 5 Bänden 1981.

MLA (8th ed.) Citation

Humboldt, Wilhelm von. "Werke." Werke in 5 Bänden, 1981.

Warning: These citations may not always be 100% accurate.