APA aipamena

Ries, E. (2011). The Lean Startup. Portfolio Penguin.

Chicago Style aipamena

Ries, Eric. The Lean Startup. Portfolio Penguin, 2011.

MLA aipamena

Ries, Eric. The Lean Startup. Portfolio Penguin, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.