Trinidad, J. A. (1991). An Information systems study on the production planning system of Abbott Laboratories, Philippines. College of Engineering.
Lua i Stíl Chicago (17ú heag.)Trinidad, Jessica A. An Information Systems Study on the Production Planning System of Abbott Laboratories, Philippines. Diliman, Quezon City: College of Engineering, 1991.
Lua MLA (9ú heag.)Trinidad, Jessica A. An Information Systems Study on the Production Planning System of Abbott Laboratories, Philippines. College of Engineering, 1991.
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