Van Hoorn, J. (2011). Play at the center of the curriculum (5th ed.). Pearson.
Cita Chicago (17th ed.)Van Hoorn, Judith. Play at the Center of the Curriculum. 5th ed. Boston: Pearson, 2011.
Cita MLA (9th ed.)Van Hoorn, Judith. Play at the Center of the Curriculum. 5th ed. Pearson, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.