Ries, E. (2011). The Lean Startup. Portfolio Penguin.
Chicago-čujuhus (17. p.)Ries, Eric. The Lean Startup. Portfolio Penguin, 2011.
MLA-čujuhus (9. p.)Ries, Eric. The Lean Startup. Portfolio Penguin, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.