Abrina, J. J., Aspra, E., & Mapue, M. C. (1994). Garahe Leathercraft: A production systems study. College of Engineering.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAbrina, Juan Jr, Edilynn Aspra, और Ma. Concepcion Mapue. Garahe Leathercraft: A Production Systems Study. Diliman, Quezon City: College of Engineering, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAbrina, Juan Jr, et al. Garahe Leathercraft: A Production Systems Study. College of Engineering, 1994.
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