Barrett Derm. (1997). Paradox Process: Creative Business Solutions, where you least expect to find them. Amacom , American Management Association.
Lua i Stíl Chicago (17ú heag.)Barrett Derm. Paradox Process: Creative Business Solutions, Where You Least Expect to Find Them. NewYork: Amacom , American Management Association, 1997.
Lua MLA (9ú heag.)Barrett Derm. Paradox Process: Creative Business Solutions, Where You Least Expect to Find Them. Amacom , American Management Association, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.