Grieshaber, S. J., & McArdle, F. (2010). The trouble with play. Open University Press.
Lua i Stíl Chicago (17ú heag.)Grieshaber, Susan Jane, agus Felicity McArdle. The Trouble with Play. Berkshire, England: Open University Press, 2010.
Lua MLA (9ú heag.)Grieshaber, Susan Jane, agus Felicity McArdle. The Trouble with Play. Open University Press, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.