Northwest Public Power Association & National Rural Electric Cooperative Association. (1947). Power unlimited.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNorthwest Public Power Association और National Rural Electric Cooperative Association. Power Unlimited. Spokane, Wash, 1947.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNorthwest Public Power Association और National Rural Electric Cooperative Association. Power Unlimited. 1947.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.