Washington (State) University. Bureau of Governmental Research and Services. Report. s.n.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington (State) University. Bureau of Governmental Research and Services. Report. Seattle: s.n.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWashington (State) University. Bureau of Governmental Research and Services. Report. s.n.
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