Deguito, T. S., Sabando, L., & Valenzuela, M. S. (1999). A quality control study on a lubricant production. College of Engineering.
Chicago-referens (17:e uppl.)Deguito, Therese Sheila, Luche Sabando, och Maria Sarah Valenzuela. A Quality Control Study on a Lubricant Production. Diliman, Quezon City: College of Engineering, 1999.
MLA-referens (9:e uppl.)Deguito, Therese Sheila, et al. A Quality Control Study on a Lubricant Production. College of Engineering, 1999.
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