Gaya APA

al, A, O, E. (2017). The Big Pad Of 50 + 50 : A Suplement To Business Mode Generation And Value Proposition Design (Ed.1). Amerika: Wiley.

Gaya MLA

al, Alex, Osterwalder, Et. "The Big Pad Of 50 + 50 : A Suplement To Business Mode Generation And Value Proposition Design". Ed.1 Amerika: Wiley, 2017. Text.