Arico, R. M. (1985). Packaging materials monitoring system Vegoil Phils., Inc. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रArico, Ruby M. Packaging Materials Monitoring System Vegoil Phils., Inc. Diliman, Quezon City: College of Engineering, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रArico, Ruby M. Packaging Materials Monitoring System Vegoil Phils., Inc. College of Engineering, 1985.
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