APA (7th ed.) Citation

White, W. G. (1980). PAD, a computer-aided molecular model building system utilizing two-dimensional graphical input. [publisher not identified].

Chicago Style (17th ed.) Citation

White, William Gerald. PAD, a Computer-aided Molecular Model Building System Utilizing Two-dimensional Graphical Input. [Place of publication not identified]: [publisher not identified], 1980.

MLA (9th ed.) Citation

White, William Gerald. PAD, a Computer-aided Molecular Model Building System Utilizing Two-dimensional Graphical Input. [publisher not identified], 1980.