APA (7th ed.) Citation

Jaspers, K. (1957). Man in the modern age. Doubleday.

Chicago Style (17th ed.) Citation

Jaspers, Karl. Man in the Modern Age. Garden City, N.Y.: Doubleday, 1957.

MLA (9th ed.) Citation

Jaspers, Karl. Man in the Modern Age. Doubleday, 1957.