एपीए उद्धरण

Alward, K., Hoorn, J. V., Nourot, P., & Scales, B. (1993). Play at the center of the curriculum. New York: Maxwell Macmillan International.

शिकागो स्टाइल उद्धरण

Alward, Keith, Judith Van Hoorn, Patricia Nourot, और Barbara Scales. Play At the Center of the Curriculum. New York: Maxwell Macmillan International, 1993.

एमएलए उद्धरण

Alward, Keith, Judith Van Hoorn, Patricia Nourot, और Barbara Scales. Play At the Center of the Curriculum. New York: Maxwell Macmillan International, 1993.