Não informado. (1971). British Journal of Educational Technology. National Council for Educational Technology.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. British Journal of Educational Technology. London: National Council for Educational Technology, 1971.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. British Journal of Educational Technology. National Council for Educational Technology, 1971.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.