Manual of recommended practice. Specifications issue of 1925. Complete to December 31, 1924

Chicago citation style
Association of American Railroads. Signal Section. Manual of recommended practice. Specifications issue of 1925. Complete to December 31, 1924. [1925]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/007924017. (Accessed December 12, 2018.)
APA citation style
Association of American Railroads. Signal Section, ([1925]) Manual of recommended practice. Specifications issue of 1925. Complete to December 31, 1924. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/007924017
MLA citation style
Association of American Railroads. Signal Section. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/007924017>.
Note: These citations are programmatically generated and may be incomplete.