APA (7th ed.) Citation

Kellner, L. (1963). Alexander von Humboldt / Lotte Kellner. Oxford University Press.

Chicago Style (17th ed.) Citation

Kellner, Lotte. Alexander Von Humboldt / Lotte Kellner. London: Oxford University Press, 1963.

MLA (9th ed.) Citation

Kellner, Lotte. Alexander Von Humboldt / Lotte Kellner. Oxford University Press, 1963.

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