Dy, G., Olvidado, I. O., & Tan, K. C. (2002). A Quality control study on Dermagen Corporation. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDy, Glady, Ingrid O. Olvidado, और Katheryn C. Tan. A Quality Control Study on Dermagen Corporation. Diliman, Quezon City: College of Engineering, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDy, Glady, et al. A Quality Control Study on Dermagen Corporation. College of Engineering, 2002.
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