एपीए उद्धरण

Hartley, R. E. (1952). Understanding children's Play. Columbia University Press.

शिकागो स्टाइल उद्धरण

Hartley, Ruth E. Understanding Children's Play. New York: Columbia University Press, 1952.

एमएलए उद्धरण

Hartley, Ruth E. Understanding Children's Play. Columbia University Press, 1952.