Frost, J. L., & Klein, B. L. (1979). Children's play and playgrounds. Allyn and Bacon.
Chicago Style (17th ed.) CitationFrost, Joe L., and Barry L. Klein. Children's Play and Playgrounds. Boston: Allyn and Bacon, 1979.
MLA citiranjeFrost, Joe L., and Barry L. Klein. Children's Play and Playgrounds. Allyn and Bacon, 1979.
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