APA (7th ed.) Citation

Goettl, B. P., & Halff, H. M. (1998). Intelligent tutoring systems: Proceedings...[of] 4th International Conference, ITS '98, San Antonio, Texas, USA, August 16-19, 1998. Springer.

Chicago Style (17th ed.) Citation

Goettl, Barry P., and Henry M. Halff. Intelligent Tutoring Systems: Proceedings...[of] 4th International Conference, ITS '98, San Antonio, Texas, USA, August 16-19, 1998. Berlin: Springer, 1998.

MLA (8th ed.) Citation

Goettl, Barry P., and Henry M. Halff. Intelligent Tutoring Systems: Proceedings...[of] 4th International Conference, ITS '98, San Antonio, Texas, USA, August 16-19, 1998. Springer, 1998.