Gratton, C., & Taylor, P. (2000). Economics of sport and recreation (2nd ed.). Spon Press.
Lua i Stíl Chicago (17ú heag.)Gratton, Chris, agus Peter Taylor. Economics of Sport and Recreation. 2nd ed. London: Spon Press, 2000.
Lua MLA (8ú heag.)Gratton, Chris, agus Peter Taylor. Economics of Sport and Recreation. 2nd ed. Spon Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.