APA (7 वां संस्करण) प्रशस्ति पत्र

Ryan, J. C. (1994). State of the Northwest. Northwest Environment Watch.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Ryan, John C. State of the Northwest. Seattle, Wash.: Northwest Environment Watch, 1994.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Ryan, John C. State of the Northwest. Northwest Environment Watch, 1994.

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