Van Hoorn, J. L. (1993). Play at the center of the curriculum. Merrill.
Chicago Style (17th ed.) CitationVan Hoorn, Judith Lieberman. Play at the Center of the Curriculum. New York: Merrill, 1993.
ציטוט MLAVan Hoorn, Judith Lieberman. Play at the Center of the Curriculum. Merrill, 1993.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.