Kumar, A. (1999). Learner performance in distance education. Commonwealth.
Chicagoスタイル(17版)引用形式Kumar, Anil. Learner Performance in Distance Education. New Delhi: Commonwealth, 1999.
MLA(9版)引用形式Kumar, Anil. Learner Performance in Distance Education. Commonwealth, 1999.
警告: この引用は必ずしも正確ではありません.