Παραπομπή σε μορφή APA (7η εκδ.)

Bray, M. (1999). The shadow education system: Private tutoring and its implications for planners. Unesco, International Institute for Educational Planning.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bray, Mark. The Shadow Education System: Private Tutoring and Its Implications for Planners. Paris: Unesco, International Institute for Educational Planning, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Bray, Mark. The Shadow Education System: Private Tutoring and Its Implications for Planners. Unesco, International Institute for Educational Planning, 1999.