3Knowles MS. On Using Learning Contract[M] . San Franciso: Jossey Bass. 1986. 45-200.
4Knowles MS. Selfdirected Learning: A guild for learner and teachers. Toronto: The Adult Education Company, 1975, 135-148.
5Caffarella R S. Fosteringaelf directed learning inpost seconddaryed education : The use of learning contracta. Life Long Leaming : An Omaibusof Practice and Research, 1983,7(3) :7-10, 25, 26.
6Lemieux C. M, Learning eontracta in the classroom: tools for empowerment and aceountability[J]. Social work education, Vol. 20, No. 2, 2001.
7Lowry M. Using learning contracts in clinical.practice[J]. Prof Nume,1997,12(4): 280-283.