Abad, G. R. I., Alcasabas, R., Cariaga, V. P., & Irong, E. C. (1999). A Quality Control Study on Superior Gas and Equipment Co., Inc. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAbad, George R. II, Ramon Alcasabas, Vincent Paul Cariaga, और Elton Cris Irong. A Quality Control Study on Superior Gas and Equipment Co., Inc. Diliman, Quezon City: College of Engineering, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAbad, George R. II, et al. A Quality Control Study on Superior Gas and Equipment Co., Inc. College of Engineering, 1999.
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