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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"A Problem That's Hard to Stomach. IN Editorial [column]." Manila Times 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"A Problem That's Hard to Stomach. IN Editorial [column]." Manila Times, 2004.
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