Van Hoorn, J. L. (1993). Play at the center of the curriculum. Merrill.
芝加哥风格引文Van Hoorn, Judith Lieberman. Play at the Center of the Curriculum. New York: Merrill, 1993.
MLA引文Van Hoorn, Judith Lieberman. Play at the Center of the Curriculum. Merrill, 1993.
警告：这些引文格式不一定是100％准确.