Fernando, J. R., Lorico, L., Santos, W., Baking, A., & Reverente, J. E. (1989). Systems and procedures study on Philippine Petroleum Company. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFernando, Jose Ramon, Liezel Lorico, Withelmina Santos, Adrian Baking, और Jose Emmanuel Reverente. Systems and Procedures Study on Philippine Petroleum Company. Diliman, Quezon City: College of Engineering, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFernando, Jose Ramon, et al. Systems and Procedures Study on Philippine Petroleum Company. College of Engineering, 1989.
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