Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.