BAUMOL WILLIAM J. (2004). FREE MARKET INNOVATION MACHINE. OXFORD UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)BAUMOL WILLIAM J. FREE MARKET INNOVATION MACHINE. NEW DELHI: OXFORD UNIVERSITY PRESS, 2004.
Lua MLA (9ú heag.)BAUMOL WILLIAM J. FREE MARKET INNOVATION MACHINE. OXFORD UNIVERSITY PRESS, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.