Cita APA (7a ed.)

Allen, C. F. (1931). Railroad curves and earthwork (7th ed., rev.). McGraw-Hill Book Company, inc..

Cita Chicago Style (17a ed.)

Allen, C. Frank. Railroad Curves and Earthwork. 7th ed., rev. New York, London: McGraw-Hill Book Company, inc., 1931.

Cita MLA (9a ed.)

Allen, C. Frank. Railroad Curves and Earthwork. 7th ed., rev. McGraw-Hill Book Company, inc., 1931.