Tovey, H. (2007). Playing outdoors: Spaces and places, risk and challenge. Open University Press.
Lua i Stíl Chicago (17ú heag.)Tovey, Helen. Playing Outdoors: Spaces and Places, Risk and Challenge. Maidenhead: Open University Press, 2007.
Lua MLA (9ú heag.)Tovey, Helen. Playing Outdoors: Spaces and Places, Risk and Challenge. Open University Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.