130 mm (5.25 in) flexible disk cartridge track format using two-frequency recording at 3979 bprad on one side - 1.9 tpmm (48 tpi) for information interchange

Chicago citation style
United States. National Bureau of Standards. 130 mm (5.25 in) flexible disk cartridge track format using two-frequency recording at 3979 bprad on one side - 1.9 tpmm (48 tpi) for information interchange. 1985. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394686. (Accessed December 16, 2018.)
APA citation style
United States. National Bureau of Standards, (1985) 130 mm (5.25 in) flexible disk cartridge track format using two-frequency recording at 3979 bprad on one side - 1.9 tpmm (48 tpi) for information interchange. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394686
MLA citation style
United States. National Bureau of Standards. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011394686>.
Note: These citations are programmatically generated and may be incomplete.