(2003). Drug firms told to seek PDEA's permission. Manila Times.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Drug Firms Told to Seek PDEA's Permission." Manila Times 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Drug Firms Told to Seek PDEA's Permission." Manila Times, 2003.
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