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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Crowley, 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Crowley, 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.