Costable, G. Fitness for life: Childhood to maturity. Time Life Books.
Lua i Stíl Chicago (17ú heag.)Costable, George. Fitness for Life: Childhood to Maturity. Time Life Books.
Lua MLA (8ú heag.)Costable, George. Fitness for Life: Childhood to Maturity. Time Life Books.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.