Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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