Electronic system to regulate Broad Street traffic

Chicago citation style
McGonigal, Harry F. Electronic system to regulate Broad Street traffic. 1955-10-03. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/7501. (Accessed December 13, 2018.)
APA citation style
McGonigal, Harry F, (1955-10-03) Electronic system to regulate Broad Street traffic. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/7501
MLA citation style
McGonigal, Harry F. Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/7501>.
Note: These citations are programmatically generated and may be incomplete.