APA (7th ed.) Citation

Burckhardt, J., & Dru, A. (1955). Letters. Pantheon Books.

Chicago Style (17th ed.) Citation

Burckhardt, Jacob, and Alexander Dru. Letters. New York: Pantheon Books, 1955.

MLA (9th ed.) Citation

Burckhardt, Jacob, and Alexander Dru. Letters. Pantheon Books, 1955.

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