APA (7th ed.) Citation

Schleucher, K. (1988). Alexander von Humboldt. Stapp.

Chicago Style (17th ed.) Citation

Schleucher, Kurt. Alexander Von Humboldt. Berlin: Stapp, 1988.

MLA (9th ed.) Citation

Schleucher, Kurt. Alexander Von Humboldt. Stapp, 1988.

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