APA (7th ed.) Zitazioa

Kirp, D. L. (2007). The sandbox investment: The preschool movement and kids-first politics. Harvard University Press.

Chicago Style (17th ed.) Zitazioa

Kirp, David L. The Sandbox Investment: The Preschool Movement and Kids-first Politics. Cambridge, Mass.: Harvard University Press, 2007.

MLA (9th ed.) Zitazioa

Kirp, David L. The Sandbox Investment: The Preschool Movement and Kids-first Politics. Harvard University Press, 2007.