5MAGGIE CHALLIS AMEE Medical Education Guide No. 11 (revised) :Portfolio- based learning and assessment in medical education [ J]. Medical Teacher, 1999,21 (4) :370 - 386.
6M. FRIEDMAN BEN DAVID, M.H. DAVIS, R. M EN, et al. AMEE Medical Education Guide No. 24: as a method of student assessment [ J ]. Medical 2001,23(6) :535 -551.