Citazione Stile APA (7a Edizione)

Bullough, R. V. (1988). Creating instructional materials (3rd ed.). Merrill.

Citazione stile Chigago Style (17a edizione)

Bullough, Robert V. Creating Instructional Materials. 3rd ed. Columbus, Ohio: Merrill, 1988.

Citatione MLA (9a ed.)

Bullough, Robert V. Creating Instructional Materials. 3rd ed. Merrill, 1988.