APA (7th ed.) Citation

Duce, D. A., Gallop, J. R., & Hopgood, F. A. (1986). Introduction to the graphical kernel system (GKS) (2nd rev. ed.). Academic Press.

Chicago Style (17th ed.) Citation

Duce, D. A., J. R. Gallop, and F. A. Hopgood. Introduction to the Graphical Kernel System (GKS). 2nd rev. ed. London: Academic Press, 1986.

MLA (8th ed.) Citation

Duce, D. A., et al. Introduction to the Graphical Kernel System (GKS). 2nd rev. ed. Academic Press, 1986.