Παραπομπή σε μορφή APA (7η εκδ.)

NATO Advanced Research Workshop on New Directions for Intelligent Tutoring Systems Sintra, Portugal, & Costa, E. (1992). New directions for intelligent tutoring systems. Springer-Verlag.

Παραπομπή σε μορφή Chicago (17η εκδ.)

NATO Advanced Research Workshop on New Directions for Intelligent Tutoring Systems Sintra, Portugal, και Ernesto Costa. New Directions for Intelligent Tutoring Systems. Berlin: Springer-Verlag, 1992.

Παραπομπή σε μορφή MLA (8th εκδ.)

NATO Advanced Research Workshop on New Directions for Intelligent Tutoring Systems Sintra, Portugal, και Ernesto Costa. New Directions for Intelligent Tutoring Systems. Springer-Verlag, 1992.