APA-referens (7:e uppl.)
Bartik, T. J. (2014). From Preschool to Prosperity: The Economic Payoff to Early Childhood Education. W.E. Upjohn Institute for Employment Research.
Chicago-referens (17:e uppl.)
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-referens (9:e uppl.)
Bartik, Timothy J. From Preschool to Prosperity: The Economic Payoff to Early Childhood Education. W.E. Upjohn Institute for Employment Research, 2014.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.