Esto, W., Fernandez, R. A., Lontoc, N., & Nieva, J. M. (1992). Lonal Merchandising Stock information system. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEsto, Wilberto, Ray Anthony Fernandez, Norman Lontoc, और John Martin Nieva. Lonal Merchandising Stock Information System. Diliman, Quezon City: College of Engineering, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEsto, Wilberto, et al. Lonal Merchandising Stock Information System. College of Engineering, 1992.
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