APA (7th ed.) Citation

Kobsa, A., & Wahlster, W. (1989). User models in dialog systems. Springer-Verlag.

Chicago Style (17th ed.) Citation

Kobsa, Alfred, and Wolfgang Wahlster. User Models in Dialog Systems. Berlin ; New York: Springer-Verlag, 1989.

MLA (8th ed.) Citation

Kobsa, Alfred, and Wolfgang Wahlster. User Models in Dialog Systems. Springer-Verlag, 1989.