Não informado. (2003). ARC News. Environmental Systems Research Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. ARC News. Redlands, Calif: Environmental Systems Research Institute, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. ARC News. Environmental Systems Research Institute, 2003.
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