APA (7th ed.) Citation

Gazdar, G., & Mellish, C. (1989). Natural language processing in Prolog: An introduction to computational linguistics. Addison-Wesley.

Chicago Style (17th ed.) Citation

Gazdar, Gerald, and Chris Mellish. Natural Language Processing in Prolog: An Introduction to Computational Linguistics. Wokingham, Eng: Addison-Wesley, 1989.

MLA (9th ed.) Citation

Gazdar, Gerald, and Chris Mellish. Natural Language Processing in Prolog: An Introduction to Computational Linguistics. Addison-Wesley, 1989.