TERRILL C. (2001). MARKET LEADERSHIP STRATEGIES FOR SERVICE COMPANIES. NTC BUSINESS BOOKS.
Lua i Stíl Chicago (17ú heag.)TERRILL C. MARKET LEADERSHIP STRATEGIES FOR SERVICE COMPANIES. CHICAGO: NTC BUSINESS BOOKS, 2001.
Lua MLA (9ú heag.)TERRILL C. MARKET LEADERSHIP STRATEGIES FOR SERVICE COMPANIES. NTC BUSINESS BOOKS, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.