Citazione Stile APA (7a Edizione)

Perlick, W. N., & Hermanson, R. H. (1981). Programmed learning aid for introduction to business (3rd ed.). Learning Systems.

Citazione stile Chigago Style (17a edizione)

Perlick, Walter N., e Roger H. Hermanson. Programmed Learning Aid for Introduction to Business. 3rd ed. Homewood, Ill: Learning Systems, 1981.

Citatione MLA (9a ed.)

Perlick, Walter N., e Roger H. Hermanson. Programmed Learning Aid for Introduction to Business. 3rd ed. Learning Systems, 1981.