Helmers, C., & Rogers, M. (2008). Innovation and the survival of new firms across British regions. University of Oxford.
Lua i Stíl Chicago (17ú heag.)Helmers, C., agus M. Rogers. Innovation and the Survival of New Firms Across British Regions. University of Oxford, 2008.
Lua MLA (9ú heag.)Helmers, C., agus M. Rogers. Innovation and the Survival of New Firms Across British Regions. University of Oxford, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.