Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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