Crawford, G. (1981). Student completion rates under three different pacing conditions. Athabasca University.
Dyfyniad Arddull ChicagoCrawford, Gail. Student Completion Rates Under Three Different Pacing Conditions. Edmonton, Alta.: Athabasca University, 1981.
Dyfyniad MLACrawford, Gail. Student Completion Rates Under Three Different Pacing Conditions. Athabasca University, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.