Ryan, J. C. (2000). State of the Northwest (Rev. 2000 ed.). Northwest Environment Watch.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRyan, John C. State of the Northwest. Rev. 2000 ed. Seattle, WA: Northwest Environment Watch, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRyan, John C. State of the Northwest. Rev. 2000 ed. Northwest Environment Watch, 2000.
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