Crowley, W. (1996). To serve the greatest number: A history of Group Health Cooperative of Puget Sound. Group Health Cooperative of Puget Sound ; University of Washington Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCrowley, Walt. To Serve the Greatest Number: A History of Group Health Cooperative of Puget Sound. Seattle, Wash: Group Health Cooperative of Puget Sound ; University of Washington Press, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCrowley, Walt. To Serve the Greatest Number: A History of Group Health Cooperative of Puget Sound. Group Health Cooperative of Puget Sound ; University of Washington Press, 1996.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.