Gaya APA

Osterwalde, A. et al (2014). Value proposition design : how to create products and services customers want, get started with ... . New Jersey: John Wiley & Sons.

Gaya MLA

Osterwalde, Alex. et al. "Value proposition design : how to create products and services customers want, get started with ...". New Jersey: John Wiley & Sons, 2014. Text.