Rowntree, D. (1992). Exploring open and distance learning. Kogan Page.
Dyfyniad Arddull ChicagoRowntree, Derek. Exploring Open and Distance Learning. London: Kogan Page, 1992.
Dyfyniad MLARowntree, Derek. Exploring Open and Distance Learning. Kogan Page, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.