Cita APA (7a ed.)

Sandburg, H. (1958). The wheel of earth. McDowell, Obolensky.

Cita Chicago Style (17a ed.)

Sandburg, Helga. The Wheel of Earth. [New York]: McDowell, Obolensky, 1958.

Cita MLA (8a ed.)

Sandburg, Helga. The Wheel of Earth. McDowell, Obolensky, 1958.