APA (7 वां संस्करण) प्रशस्ति पत्र

WORK, J., & Brand, G. (2020). E-Commerce Business Model 2020: This Book Includes. INDEPENDENTLY PUBLISHED.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

WORK, JIM, और George Brand. E-Commerce Business Model 2020: This Book Includes. [S.l.]: INDEPENDENTLY PUBLISHED, 2020.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

WORK, JIM, और George Brand. E-Commerce Business Model 2020: This Book Includes. INDEPENDENTLY PUBLISHED, 2020.