APA aipamena

Van Hoorn, J. L. (1993). Play at the center of the curriculum. Merrill.

Chicago Style aipamena

Van Hoorn, Judith Lieberman. Play at the Center of the Curriculum. New York: Merrill, 1993.

MLA aipamena

Van Hoorn, Judith Lieberman. Play at the Center of the Curriculum. Merrill, 1993.