Graphical Kernel System (GKS)

Chicago citation style
United States. National Bureau of Standards. Graphical Kernel System (GKS). 1986. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394683. (Accessed December 13, 2018.)
APA citation style
United States. National Bureau of Standards, (1986) Graphical Kernel System (GKS). Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011394683
MLA citation style
United States. National Bureau of Standards. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011394683>.
Note: These citations are programmatically generated and may be incomplete.