D. Freeman

发表

S. Brookhart, D. Freeman, 1992 .

A. Porter, Robert E. Floden, W. Schmidt, 1987 .

Therese M. Kuhs, A. Porter, Robert E. Floden, 1983, The Elementary School Journal.

Andrew C. Porter, A. Porter, Robert E. Floden, 1988 .

Philip A. Cusick, R. Houang, D. Freeman, 1985 .

Susan M. Brookhart, Donald J. Freeman, S. Brookhart, 1999 .

S. Brookhart, D. Freeman, William E. Loadman, 1999 .