[1] Baker, A. J., Piotrkowski, C. S. & Brooks-Gunn, J. (1998). The effects of the Home Instruction Program for Preschool Youngsters (HIPPY) on’Children’s school performance at the end of the program and one year later. Early Childhood Research Quarterly, 13(4), 571-588. https://doi.org.10.1016/S0885-2006(99)80061-1
[2] Bradley, R. H. & Gilkey, B. (2002). The Impact of the Home Instructional Program for Preschool Youngsters (HIPPY) on School Performance in 3rd and 6th Grades. Early Education & Development, 13(3), 301–312. https://doi.org/10.1207/s15566935eed1303_4
[3] Nievar, M. A., Jacobson, A., Chen, Q., Johnson, U. y Dier, S. (2011). Impact of HIPPY on home learning environments of Latino families. Early Childhood Research Quarterly, 26(3), 268-277. https://doi.org/10.1016/j.ecresq.2011.01.002
[4] Barhava‐Mònteith, G., Harré, N. & Field, J. (1999). A Promising Start: An Evaluation of the HIPPY Program in New Zealand. Early Child Development and Care, 159(1), 145–157. https://doi.org/10.1080/0300443991590112