Cita APA

Whitman, W., & Sandburg, C. (1921). Leaves of grass. New York: Modern Library.

Citación estilo Chicago

Whitman, Walt, y Carl Sandburg. Leaves of Grass. New York: Modern Library, 1921.

Cita MLA

Whitman, Walt, y Carl Sandburg. Leaves of Grass. New York: Modern Library, 1921.