Cita APA (7a ed.)

Bork, A., & Gunnarsdottir, S. (2001). Tutorial distance learning: Rebuilding our educational system. Kluwer Academic-Plenum.

Cita Chicago Style (17a ed.)

Bork, Alfred, y Sigrun Gunnarsdottir. Tutorial Distance Learning: Rebuilding Our Educational System. New York [etc.]: Kluwer Academic-Plenum, 2001.

Cita MLA (9a ed.)

Bork, Alfred, y Sigrun Gunnarsdottir. Tutorial Distance Learning: Rebuilding Our Educational System. Kluwer Academic-Plenum, 2001.