Ries, E. (2011). The Lean Startup. Portfolio Penguin.
Lua i Stíl Chicago (17ú heag.)Ries, Eric. The Lean Startup. Portfolio Penguin, 2011.
Lua MLA (9ú heag.)Ries, Eric. The Lean Startup. Portfolio Penguin, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.