American Educational Research Association, Travers, R. M. W., & Gage, N. L. (1973). Second handbook of research on teaching: A project of the American Educational Research Association. Rand McNally.

American Educational Research Association, Robert Morris William Travers, and N. L. Gage. Second Handbook of Research on Teaching: A Project of the American Educational Research Association. Chicago: Rand McNally, 1973.

American Educational Research Association, et al. Second Handbook of Research on Teaching: A Project of the American Educational Research Association. Rand McNally, 1973.