Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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