Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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