Baritugo, J. P., Catanghal, E., Legaspi, M. T., Umali, H. J., & Yu, L. (1993). A Production systems study on Jollibee Foods Corporation. College of Engineering.
Chicago-referens (17:e uppl.)Baritugo, Jean Paul, Elena Catanghal, Ma. Theresa Legaspi, Honorio Jr Umali, och Lawrence Yu. A Production Systems Study on Jollibee Foods Corporation. Diliman, Quezon City: College of Engineering, 1993.
MLA-referens (9:e uppl.)Baritugo, Jean Paul, et al. A Production Systems Study on Jollibee Foods Corporation. College of Engineering, 1993.
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