APA (7th ed.) Citation

Hopgood, F. R. A. (1989). Introduction to the Graphical Kernel System (GKS) (2nd ed. / revised for the International Standard.). Academic Press.

Chicago Style (17th ed.) Citation

Hopgood, F. R. A. Introduction to the Graphical Kernel System (GKS). 2nd ed. / revised for the International Standard. London [etc.]: Academic Press, 1989.

MLA (9th ed.) Citation

Hopgood, F. R. A. Introduction to the Graphical Kernel System (GKS). 2nd ed. / revised for the International Standard. Academic Press, 1989.