Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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