APA-viite (7. p.)
Bartik, T. J. (2014). From Preschool to Prosperity: The Economic Payoff to Early Childhood Education. W.E. Upjohn Institute for Employment Research.
Chicago-viite (17. p.)
Bartik, Timothy J. From Preschool to Prosperity: The Economic Payoff to Early Childhood Education. Kalamazoo, Michigan: W.E. Upjohn Institute for Employment Research, 2014.
MLA-viite (9. p.)
Bartik, Timothy J. From Preschool to Prosperity: The Economic Payoff to Early Childhood Education. W.E. Upjohn Institute for Employment Research, 2014.
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