APA (7th ed.) Citation

Sandburg, C., & Mitgang, H. (1968). The letters of Carl Sandburg. Harcourt, Brace & World.

Chicago Style (17th ed.) Citation

Sandburg, Carl, and Herbert Mitgang. The Letters of Carl Sandburg. New York: Harcourt, Brace & World, 1968.

MLA (9th ed.) Citation

Sandburg, Carl, and Herbert Mitgang. The Letters of Carl Sandburg. Harcourt, Brace & World, 1968.