Rumble, G. The costs and economics of open and distance learning.
Chicagoスタイル(17版)引用形式Rumble, Greville. The Costs and Economics of Open and Distance Learning.
MLA(8版)引用形式Rumble, Greville. The Costs and Economics of Open and Distance Learning.
警告: この引用は必ずしも正確ではありません.