General Electric engineers study an oscillogram

Chicago citation style
General Electric engineers study an oscillogram. 1952-06-13. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/1322. (Accessed December 14, 2018.)
APA citation style
(1952-06-13) General Electric engineers study an oscillogram. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/1322
MLA citation style
Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/1322>.
Note: These citations are programmatically generated and may be incomplete.