Vergara, R. B. (2001). On-line grocery shopping vs traditional supermarketing. Manila Times.
Cita Chicago (17th ed.)Vergara, Ricky B. "On-line Grocery Shopping Vs Traditional Supermarketing." Manila Times 2001.
Cita MLA (9th ed.)Vergara, Ricky B. "On-line Grocery Shopping Vs Traditional Supermarketing." Manila Times, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.