Cita APA (7th ed.)

Van Hoorn, J. (2003). Play at the center of the curriculum (3rd ed.). Merrill Prentice Hall.

Cita Chicago (17th ed.)

Van Hoorn, Judith. Play at the Center of the Curriculum. 3rd ed. Upper Saddle River, N.J: Merrill Prentice Hall, 2003.

Cita MLA (9th ed.)

Van Hoorn, Judith. Play at the Center of the Curriculum. 3rd ed. Merrill Prentice Hall, 2003.