HARDY LEN. (1987). SUCCESSFUL BUSINESS STRATEGY HOW TO WIN IN THE MARKET PLACE. KOGAN PAGE.
Lua i Stíl Chicago (17ú heag.)HARDY LEN. SUCCESSFUL BUSINESS STRATEGY HOW TO WIN IN THE MARKET PLACE. LONDON: KOGAN PAGE, 1987.
Lua MLA (9ú heag.)HARDY LEN. SUCCESSFUL BUSINESS STRATEGY HOW TO WIN IN THE MARKET PLACE. KOGAN PAGE, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.