IRWIN DAVID. (1998). MAKE YOUR BUSINESS GROW. INTERNATIONAL THOMSON BUSINESS PRESS.
Lua i Stíl Chicago (17ú heag.)IRWIN DAVID. MAKE YOUR BUSINESS GROW. LONDON: INTERNATIONAL THOMSON BUSINESS PRESS, 1998.
Lua MLA (9ú heag.)IRWIN DAVID. MAKE YOUR BUSINESS GROW. INTERNATIONAL THOMSON BUSINESS PRESS, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.