HUSSEY DAVID. (1996). HOW TO MOTIVATE PEOPLE. KOGAN PAGE.
Lua i Stíl Chicago (17ú heag.)HUSSEY DAVID. HOW TO MOTIVATE PEOPLE. KOGAN PAGE, 1996.
Lua MLA (9ú heag.)HUSSEY DAVID. HOW TO MOTIVATE PEOPLE. KOGAN PAGE, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.