Washington (State). Governor's Council on Aging & Hopkins, W. S. (1961). Aging in the State of Washington: A report. University of Washington Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington (State). Governor's Council on Aging और William Stephen Hopkins. Aging in the State of Washington: A Report. Seattle: University of Washington Press, 1961.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington (State). Governor's Council on Aging और William Stephen Hopkins. Aging in the State of Washington: A Report. University of Washington Press, 1961.
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