Cita APA (7a ed.)

Costa, E. (1992). New directions for intelligent tutoring systems. Springer.

Cita Chicago Style (17a ed.)

Costa, Ernesto. New Directions for Intelligent Tutoring Systems. Berlín: Springer, 1992.

Cita MLA (9a ed.)

Costa, Ernesto. New Directions for Intelligent Tutoring Systems. Springer, 1992.