HAMEL GARY. (1994). COMRETING FOR THE FUTUER. HARVARD BUSINESS SCHOOL.
Lua i Stíl Chicago (17ú heag.)HAMEL GARY. COMRETING FOR THE FUTUER. BOSTON: HARVARD BUSINESS SCHOOL, 1994.
Lua MLA (9ú heag.)HAMEL GARY. COMRETING FOR THE FUTUER. HARVARD BUSINESS SCHOOL, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.