Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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