Gaya APA

Blank, S. (2021). The Four Steps to the Epiphany: Successful Strategies for Products That Win (Edisi Ke-5). Hoboken: John Wiley & Son.

Gaya MLA

Blank, Steve. "The Four Steps to the Epiphany: Successful Strategies for Products That Win". Edisi Ke-5 Hoboken: John Wiley & Son, 2021. Printed.