Citazione Stile APA (7a Edizione)

Gropper, G. L. (1991). Text displays: Analysis and systematic design. Educational Technology Publications.

Citazione stile Chigago Style (17a edizione)

Gropper, George Leonard. Text Displays: Analysis and Systematic Design. Englewood Cliffs, N.J.: Educational Technology Publications, 1991.

Citatione MLA (8a ed.)

Gropper, George Leonard. Text Displays: Analysis and Systematic Design. Educational Technology Publications, 1991.