LEEPER, S. H., DALES, R. J., & SKIPPER, D. S. (1968). Good schools for young children. The MacMillan Company.

LEEPER, Sarah Hammond, Ruth J. DALES, and Dora Sikes SKIPPER. Good Schools for Young Children. London: The MacMillan Company, 1968.

LEEPER, Sarah Hammond, et al. Good Schools for Young Children. The MacMillan Company, 1968.