Cabrera, M. P. Maintenance in engineering laboratories. Philippine Engineering Journal.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCabrera, Macario P. "Maintenance in Engineering Laboratories." Philippine Engineering Journal .
एमएलए (9वां संस्करण) प्रशस्ति पत्रCabrera, Macario P. "Maintenance in Engineering Laboratories." Philippine Engineering Journal, .
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