Sigman, H. (2008). The Economics of hazardous waste and contaminated land. Edward Elgar.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSigman, Hilary. The Economics of Hazardous Waste and Contaminated Land. Cheltenham, UK: Edward Elgar, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSigman, Hilary. The Economics of Hazardous Waste and Contaminated Land. Edward Elgar, 2008.
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