APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Allen, Frank C. Railroad Curves and Earthwork. 7th ed. London: McGraw-Hill, 1931.

MLA (9th ed.) Citation

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