LOWIS DAVID. (1990). SECRETS OF LANGAUAGE OF SUCCESS: ACHIEVE IT ALL IN BUSINESS AND LIFE. CORGI BOOK.
Lua i Stíl Chicago (17ú heag.)LOWIS DAVID. SECRETS OF LANGAUAGE OF SUCCESS: ACHIEVE IT ALL IN BUSINESS AND LIFE. LONDON: CORGI BOOK, 1990.
Lua MLA (9ú heag.)LOWIS DAVID. SECRETS OF LANGAUAGE OF SUCCESS: ACHIEVE IT ALL IN BUSINESS AND LIFE. CORGI BOOK, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.