Trinidad, J. A. (1991). An Information systems study on the production planning system of Abbott Laboratories, Philippines. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTrinidad, Jessica A. An Information Systems Study on the Production Planning System of Abbott Laboratories, Philippines. Diliman, Quezon City: College of Engineering, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTrinidad, Jessica A. An Information Systems Study on the Production Planning System of Abbott Laboratories, Philippines. College of Engineering, 1991.
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