Gravides, X. (2001). Increase in PGH fees drives poor patients away. Philippine Collegian.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGravides, Xavier. "Increase in PGH Fees Drives Poor Patients Away." Philippine Collegian 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGravides, Xavier. "Increase in PGH Fees Drives Poor Patients Away." Philippine Collegian, 2001.
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