Shipman, G. A. (1962). Medical service corporations in the State of Washington: A study of the administration of physician-sponsored pre-paid medical care. Harvard University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रShipman, George A. Medical Service Corporations in the State of Washington: A Study of the Administration of Physician-sponsored Pre-paid Medical Care. Cambridge: Harvard University Press, 1962.
एमएलए (8वां संस्करण) प्रशस्ति पत्रShipman, George A. Medical Service Corporations in the State of Washington: A Study of the Administration of Physician-sponsored Pre-paid Medical Care. Harvard University Press, 1962.
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