Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Gazdar, Gerald, y C. S. Mellish. Natural Language Processing in Prolog: An Introduction to Computational Linguistics. Wokingham: Addison-Weseley : cop, 1989.

Cita MLA (9a ed.)

Gazdar, Gerald, y C. S. Mellish. Natural Language Processing in Prolog: An Introduction to Computational Linguistics. Addison-Weseley : cop, 1989.