7Adam Winsler, Sarah L. Caverly el, The social and behavioral ecology of mixed - age and sameage preschool classrooms:A natural experim- entp [ J ]. Applied Developmental Psychology, 2002.
8Kimberlee Whaley, Rebecca Kantor. Mixed - Age grouping in infant/toddler child care:enhan- cing developmental processes [ J ]. Child and Youth Care Forum,1992.
9Nina S. Mounts, Jaipaul L. Roopnarine. Socialcognitive play patterns in same- age and mixed - age preschool classrooms [ ] ]. American Educational Research Journal, 1987.