Villanueva, M. C. C., & Espina, M. A. A. (1999). Likas Lingap: Landscape development of highways along lahar-devastated areas.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVillanueva, Mary Claire C., और Mary Ann A. Espina. Likas Lingap: Landscape Development of Highways Along Lahar-devastated Areas. 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVillanueva, Mary Claire C., और Mary Ann A. Espina. Likas Lingap: Landscape Development of Highways Along Lahar-devastated Areas. 1999.
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