Ehlers, U. (2006). Handbook on quality and standardisation in e-learning. New York: Springer.
シカゴスタイル引用形Ehlers, Ulf-Daniel. Handbook On Quality and Standardisation in E-learning. New York: Springer, 2006.
MLA引用形式Ehlers, Ulf-Daniel. Handbook On Quality and Standardisation in E-learning. New York: Springer, 2006.
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