Valerie E.V.E.LeeValerie E.V.E. i inni, Are Head Start Effects Sustained? A Longitudinal Follow-Up Comparison of Disadvantaged Children Attending Head Start, No Preschool, and Other Preschool Programs, „Child Development”, 61 (2), 1990, s. 495–507, DOI: 10.2307/1131110, ISSN0009-3920, JSTOR: 1131110 [dostęp 2019-03-05].
KyungheeK.LeeKyungheeK., Impacts of the duration of Head Start enrollment on children's academic outcomes: moderation effects of family risk factors and earlier outcomes, „Journal of Community Psychology”, 39 (6), 2011, s. 698–716, DOI: 10.1002/jcop.20462, ISSN1520-6629 [dostęp 2019-03-05](ang.).
DavidD.DemingDavidD., Early Childhood Intervention and Life-Cycle Skill Development: Evidence from Head Start, „American Economic Journal: Applied Economics”, 1 (3), 2009, s. 111–134, DOI: 10.1257/app.1.3.111, ISSN1945-7782 [dostęp 2019-03-05](ang.).
Valerie E.V.E.LeeValerie E.V.E. i inni, Are Head Start Effects Sustained? A Longitudinal Follow-Up Comparison of Disadvantaged Children Attending Head Start, No Preschool, and Other Preschool Programs, „Child Development”, 61 (2), 1990, s. 495–507, DOI: 10.2307/1131110, ISSN0009-3920, JSTOR: 1131110 [dostęp 2019-03-05].
ElianaE.GarcesElianaE., DuncanD.ThomasDuncanD., JanetJ.CurrieJanetJ., Longer-Term Effects of Head Start, „The American Economic Review”, 92 (4), 2002, s. 999–1012, ISSN0002-8282 [dostęp 2019-03-05].
JensJ.LudwigJensJ., DeborahD.PhillipsDeborahD., The Benefits and Costs of Head Start, „Social Policy Report”, 21 (3), Society for Research in Child Development, 2007 [dostęp 2019-03-05](ang.). Brak numerów stron w czasopiśmie
Marianne PM.P.BitlerMarianne PM.P., Hilary WH.W.HoynesHilary WH.W., ThurstonT.DominaThurstonT., Experimental Evidence on Distributional Effects of Head Start [online], The National Bureau of Economic Research, sierpień 2014 [dostęp 2019-03-05].
ChloeCh.GibbsChloeCh., JensJ.LudwigJensJ., Douglas LD.L.MillerDouglas LD.L., Does Head Start Do Any Lasting Good? [online], The National Bureau of Economic Research, wrzesień 2011 [dostęp 2019-03-05].
Valerie E.V.E.LeeValerie E.V.E. i inni, Are Head Start Effects Sustained? A Longitudinal Follow-Up Comparison of Disadvantaged Children Attending Head Start, No Preschool, and Other Preschool Programs, „Child Development”, 61 (2), 1990, s. 495–507, DOI: 10.2307/1131110, ISSN0009-3920, JSTOR: 1131110 [dostęp 2019-03-05].
ElianaE.GarcesElianaE., DuncanD.ThomasDuncanD., JanetJ.CurrieJanetJ., Longer-Term Effects of Head Start, „The American Economic Review”, 92 (4), 2002, s. 999–1012, ISSN0002-8282 [dostęp 2019-03-05].
KyungheeK.LeeKyungheeK., Impacts of the duration of Head Start enrollment on children's academic outcomes: moderation effects of family risk factors and earlier outcomes, „Journal of Community Psychology”, 39 (6), 2011, s. 698–716, DOI: 10.1002/jcop.20462, ISSN1520-6629 [dostęp 2019-03-05](ang.).
DavidD.DemingDavidD., Early Childhood Intervention and Life-Cycle Skill Development: Evidence from Head Start, „American Economic Journal: Applied Economics”, 1 (3), 2009, s. 111–134, DOI: 10.1257/app.1.3.111, ISSN1945-7782 [dostęp 2019-03-05](ang.).