APA ציטוט

Sandburg, C., & Mitgang, H. ,. (1968). The Letters of Carl Sandburg. New York: Harcourt, Brace & World.

Trích dẫn kiểu Chicago

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

ציטוט MLA

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