Sukhija, P. (2010). E-Commerce: Opportunities & Challenges.
Chicago Style aipamenaSukhija, Piyush. E-Commerce: Opportunities & Challenges. [s.l], 2010.
MLA aipamenaSukhija, Piyush. E-Commerce: Opportunities & Challenges. 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.