Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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