Diaz, I. R., Fulgencio, C. B., JUmaquio, J. S., & Lim, F. I. B. (2001). An Industrial systems design study on APO Pipes Industries Corporation (APIC). College of Engineering.
Chicago-referens (17:e uppl.)Diaz, Irma R., Charisma B. Fulgencio, Jayson S. JUmaquio, och Fritz Ivan B. Lim. An Industrial Systems Design Study on APO Pipes Industries Corporation (APIC). Diliman, Quezon City: College of Engineering, 2001.
MLA-referens (9:e uppl.)Diaz, Irma R., et al. An Industrial Systems Design Study on APO Pipes Industries Corporation (APIC). College of Engineering, 2001.
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