David, R. J. (2002). Sweet solution to garbage problem. IN At large [column]. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDavid, Rina Jimenez. "Sweet Solution to Garbage Problem. IN At Large [column]." Philippine Daily Inquirer 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDavid, Rina Jimenez. "Sweet Solution to Garbage Problem. IN At Large [column]." Philippine Daily Inquirer, 2002.
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