2Anonymous (2007).Speakers' biographies [EB/OL].Retrieved on 5 February 2007. <http://sell.hil.no/icde_scop/keynote.html#sewart>. 被引量：1
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4David Sewart (1978).Continuity of concern for students in a system of learning at a distance [M]. ZIFF. Hagen: FernUniversit?t, 1978. 被引量：1
5David Sewart (1986).Single Mode versus Dual Mode: A Fair Question?[J]. Open Campus, 1986(12):10-15. 被引量：1
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7David Sewart(1998 ).Tuition and counselling: Supporting teachers for competitive advantage [A]. C. Latchem and F. Lockwood (Eds.). Staff development in opeu and flexible learning [C]. London: Routledge, 1998:148-156. 被引量：1
