Railroad operation and railway signaling

Chicago citation style
Phillips, Edmund John. Railroad operation and railway signaling. 1942. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/002567896. (Accessed December 15, 2018.)
APA citation style
Phillips, Edmund John, (1942) Railroad operation and railway signaling. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/002567896
MLA citation style
Phillips, Edmund John. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/002567896>.
Note: These citations are programmatically generated and may be incomplete.