1. The Production of Quality in Child Care Centers
2. Harms, T. & Clifford, R. M. (1980). The early childhood environment rating scale. New York: Teachers College Press.
3. Harms, T. & Clifford, R. M. (1989). The family day care rating scale. New York: Teachers College Press.
4. Harms, T., Cryer, D. & Clifford, R. M. (1986). Infant/toddler environment rating scale. New York: Teachers College Press.
5. Lamb, M. E. (1998). Nonparental child care: Context, quality, correlates, and consequences. In W. Damon, I. E. Sigel, & K. A. Renninger (Eds.), Handbook of child psychology: Vol. 4. Child psychology in practice (5th ed., pp. 73-133). New York: Wiley.