APA

Raymond W. G., Riggs H. C. & Sadler W. C. (1937). The elements of railroad engineering. New York: Wiley.

Chicago

Raymond William G, Riggs Henry C and Sadler Walter C. 1937. The elements of railroad engineering. New York: Wiley.

Harvard

Raymond W. G., Riggs H. C. and Sadler W. C. (1937). The elements of railroad engineering. New York: Wiley.

MLA

Raymond William G, Riggs Henry C and Sadler Walter C. The elements of railroad engineering. New York: Wiley. 1937.