Alampay, E. G., Gan, K., & Lacanaria, S. (1991). An Information Systems Study on TRENDS, Inc. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAlampay, Erwin G., Kerstin Gan, और Sofia Lacanaria. An Information Systems Study on TRENDS, Inc. Diliman, Quezon City: College of Engineering, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAlampay, Erwin G., et al. An Information Systems Study on TRENDS, Inc. College of Engineering, 1991.
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