Ries, E. (2011). The Lean Startup. Portfolio Penguin.
Cita Chicago (17th ed.)Ries, Eric. The Lean Startup. Portfolio Penguin, 2011.
Cita MLA (9th ed.)Ries, Eric. The Lean Startup. Portfolio Penguin, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.