Castro, C. A. S., Lomabao, L. P., & Sison, W. M. (1996). A Production systems study on Gomeco Metal Corporation. College of Engineering.
Chicago-referens (17:e uppl.)Castro, Carlo Alfred S., Lawrence P. Lomabao, och Wilbert M. Sison. A Production Systems Study on Gomeco Metal Corporation. Diliman, Quezon City: College of Engineering, 1996.
MLA-referens (9:e uppl.)Castro, Carlo Alfred S., et al. A Production Systems Study on Gomeco Metal Corporation. College of Engineering, 1996.
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