APA (7th ed.) Citation

Walker, A. (1990). Knowledge systems and Prolog: Developing expert, database, and natural language systems (2nd ed.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Walker, Adrian. Knowledge Systems and Prolog: Developing Expert, Database, and Natural Language Systems. 2nd ed. Reading, Mass: Addison-Wesley, 1990.

MLA (9th ed.) Citation

Walker, Adrian. Knowledge Systems and Prolog: Developing Expert, Database, and Natural Language Systems. 2nd ed. Addison-Wesley, 1990.