Rigby, R. (2011). 28 Business Thinkers Who Changed the World. Kogan Page.
Lua i Stíl Chicago (17ú heag.)Rigby, Rhymer. 28 Business Thinkers Who Changed the World. Kogan Page, 2011.
Lua MLA (9ú heag.)Rigby, Rhymer. 28 Business Thinkers Who Changed the World. Kogan Page, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.