Harms, T., Clifford, R. M., & Cryer, D. (1998). Early childhood environment rating scale (Rev. ed.). Teachers College Press.
Cita Chicago Style (17a ed.)Harms, Thelma, Richard M. Clifford, y Debby Cryer. Early Childhood Environment Rating Scale. Rev. ed. New York: Teachers College Press, 1998.
Cita MLA (9a ed.)Harms, Thelma, et al. Early Childhood Environment Rating Scale. Rev. ed. Teachers College Press, 1998.
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