Kelsey, C., & Gray, H. (1986). The feasibility study process for parks and recreation. American Association for Leisure and Recreation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKelsey, Craig, और Howard Gray. The Feasibility Study Process for Parks and Recreation. Reston, Va: American Association for Leisure and Recreation, 1986.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKelsey, Craig, और Howard Gray. The Feasibility Study Process for Parks and Recreation. American Association for Leisure and Recreation, 1986.
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