BARKER ALAN. (1996). CREATIVITY FOR MANAGERS. EXCEL BOOK.
Lua i Stíl Chicago (17ú heag.)BARKER ALAN. CREATIVITY FOR MANAGERS. NEW DELHI: EXCEL BOOK, 1996.
Lua MLA (9ú heag.)BARKER ALAN. CREATIVITY FOR MANAGERS. EXCEL BOOK, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.