APA (7th ed.) Citation

Clocksin, W. F., & Mellish, C. S. Programming in Prolog.

Chicago Style (17th ed.) Citation

Clocksin, W. F., and C. S. Mellish. Programming in Prolog.

MLA (9th ed.) Citation

Clocksin, W. F., and C. S. Mellish. Programming in Prolog.

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