APA (7th ed.) Citation

Beam, G. (1989). Clipper: A programmer's guide. Windcrest.

Chicago Style (17th ed.) Citation

Beam, Gary. Clipper: A Programmer's Guide. [S.l.]: Windcrest, 1989.

MLA (8th ed.) Citation

Beam, Gary. Clipper: A Programmer's Guide. Windcrest, 1989.