APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.