Hassell, S., Clancy, N., Burger, N., Nelson, C., & Rudavsky, R. (2010). An Assessment of the U.S. Environmental Protection Agency's National Environmental Performance Track Program. RAND Corporation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHassell, Scott, Noreen Clancy, Nicholas Burger, Christopher Nelson, और Rena Rudavsky. An Assessment of the U.S. Environmental Protection Agency's National Environmental Performance Track Program. RAND Corporation, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHassell, Scott, et al. An Assessment of the U.S. Environmental Protection Agency's National Environmental Performance Track Program. RAND Corporation, 2010.
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