Gropper, G. L. (1991). Text displays: Analysis and systematic design. Educational Technology Publications.
Citación estilo ChicagoGropper, George Leonard. Text Displays: Analysis and Systematic Design. Englewood Cliffs, N.J.: Educational Technology Publications, 1991.
Cita MLAGropper, George Leonard. Text Displays: Analysis and Systematic Design. Educational Technology Publications, 1991.
Warning: These citations may not always be 100% accurate.