APA (7th ed.) Citation

Spence, R. (1989). Clipper programming guide. Microtrend Books.

Chicago Style (17th ed.) Citation

Spence, Rick. Clipper Programming Guide. San Marcos, CA: Microtrend Books, 1989.

MLA (9th ed.) Citation

Spence, Rick. Clipper Programming Guide. Microtrend Books, 1989.

Warning: These citations may not always be 100% accurate.