Blank, S. (2013). The Four steps to the epiphany: Succesful strategies for products that win (5th edition.). K&S Ranch.
Cita Chicago Style (17a ed.)Blank, Steve. The Four Steps to the Epiphany: Succesful Strategies for Products That Win. 5th edition. Pescadero, California: K&S Ranch, 2013.
Cita MLA (9a ed.)Blank, Steve. The Four Steps to the Epiphany: Succesful Strategies for Products That Win. 5th edition. K&S Ranch, 2013.
Precaución: Estas citas no son 100% exactas.