APA (7th ed.) Citation

Hopgood, F. R. A., Duce, D. A., Gallop, J. R., & Sutcliffe, D. C. (1989). Introduction to the graphical Kernel system (GKS) (2nd ed.). Academic press.

Chicago Style (17th ed.) Citation

Hopgood, F. R. A., D. A. Duce, J. R. Gallop, and D. C. Sutcliffe. Introduction to the Graphical Kernel System (GKS). 2nd ed. Toronto: Academic press, 1989.

MLA (9th ed.) Citation

Hopgood, F. R. A., et al. Introduction to the Graphical Kernel System (GKS). 2nd ed. Academic press, 1989.