Vergara, R. B. (2001). On-line grocery shopping vs traditional supermarketing. Manila Times.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVergara, Ricky B. "On-line Grocery Shopping Vs Traditional Supermarketing." Manila Times 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVergara, Ricky B. "On-line Grocery Shopping Vs Traditional Supermarketing." Manila Times, 2001.
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