8Lewis,R & Spencer ,D(1986)What is open learning?Guides series Vol.4.London:Council for Educational Technology. 被引量：1
9Greville Rumble.'Open learning', 'distance learning', and the misuse of language[J].Open Learning: The Journal of Open and Distance Learning, 1989(2):28-36. 被引量：1
10Campion, MandKelly, M(1988) Integration of external studies and campus-based education in Australian higher education: the myth and the promise .Distance education 9(2). 被引量：1
