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Dyfyniad Arddull ChicagoGUPTA VIVEK. MANAGING E-BUSINESS: STRATEGIES AND CASES. HYDEERABAD: ICFAI BOOKS, 2003.
Dyfyniad MLAGUPTA VIVEK. MANAGING E-BUSINESS: STRATEGIES AND CASES. ICFAI BOOKS, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.