APA (7th ed.) Citation

Lucas, P., & Gaag, L. v. d. (1991). Principles of expert systems. Addison-Wesley.

Chicago Style (17th ed.) Citation

Lucas, Peter, and Linda van der Gaag. Principles of Expert Systems. Wokingham, Eng: Addison-Wesley, 1991.

MLA (9th ed.) Citation

Lucas, Peter, and Linda van der Gaag. Principles of Expert Systems. Addison-Wesley, 1991.