Sandoval, B., Tan, L., & Tarrayo, R. J. (1986). Methods study of Saniwares Corporation. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSandoval, Benjamin, Lester Tan, और Romeo Jr Tarrayo. Methods Study of Saniwares Corporation. Diliman, Quezon City: College of Engineering, 1986.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSandoval, Benjamin, et al. Methods Study of Saniwares Corporation. College of Engineering, 1986.
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