Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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