Hamel, G. (1994). Competing for the Future. McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Hamel, Gary. Competing for the Future. McGraw Hill, 1994.
Lua MLA (9ú heag.)Hamel, Gary. Competing for the Future. McGraw Hill, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.