Παραπομπή σε μορφή APA (7η εκδ.)

Mason, R. D. (1978). Programmed learning aid for business and consumer mathematics. Learning Systems.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Mason, Robert D. Programmed Learning Aid for Business and Consumer Mathematics. Homewood, Ill: Learning Systems, 1978.

Παραπομπή σε μορφή MLA (9th εκδ.)

Mason, Robert D. Programmed Learning Aid for Business and Consumer Mathematics. Learning Systems, 1978.