Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1989). Educational Technology Research and Development. Association for Educational Communications and Technology.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. Educational Technology Research and Development. Washington: Association for Educational Communications and Technology, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. Educational Technology Research and Development. Association for Educational Communications and Technology, 1989.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.