Fridell Ron. (2008). Cool Science Sports Technology. Lerner.
Lua i Stíl Chicago (17ú heag.)Fridell Ron. Cool Science Sports Technology. Lerner, 2008.
Lua MLA (9ú heag.)Fridell Ron. Cool Science Sports Technology. Lerner, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.