Rectangular holes in twelve-row punched cards

Chicago citation style
United States. National Bureau of Standards. Rectangular holes in twelve-row punched cards. 1971. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394588. (Accessed December 19, 2018.)
APA citation style
United States. National Bureau of Standards, (1971) Rectangular holes in twelve-row punched cards. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394588
MLA citation style
United States. National Bureau of Standards. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011394588>.
Note: These citations are programmatically generated and may be incomplete.