Citazione Stile APA (7a Edizione)

Bullough, R. V. (1974). Creating instructional materials. C. E. Merrill Pub. Co.

Citazione stile Chigago Style (17a edizione)

Bullough, Robert V. Creating Instructional Materials. Columbus, Ohio: C. E. Merrill Pub. Co, 1974.

Citatione MLA (8a ed.)

Bullough, Robert V. Creating Instructional Materials. C. E. Merrill Pub. Co, 1974.