Dyfyniad APA

(1989). Educational technology research and development: ETR & D. Association for Educational Communications and Technology.

Dyfyniad Arddull Chicago

Educational Technology Research and Development: ETR & D. Washington, D.C.: Association for Educational Communications and Technology, 1989.

Dyfyniad MLA

Educational Technology Research and Development: ETR & D. Association for Educational Communications and Technology, 1989.

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