Carlisle, R. P. (2009). Encyclopedia of play in today's society. SAGE.
Lua i Stíl Chicago (17ú heag.)Carlisle, Rodney P. Encyclopedia of Play in Today's Society. Los Angeles: SAGE, 2009.
Lua MLA (9ú heag.)Carlisle, Rodney P. Encyclopedia of Play in Today's Society. SAGE, 2009.
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