Não informado. (2002). Parks & Recreation. American Institute of Park Executives.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Parks & Recreation. Wheeling, Ill: American Institute of Park Executives, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Parks & Recreation. American Institute of Park Executives, 2002.
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