Varangis, P. N., Crossley, R., & Braga, C. A. P. (1995). Is there a commercial case for tropical timber certificationn. World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVarangis, Panayotis N., Rachel Crossley, और Carlos Alberto Primo Braga. Is There a Commercial Case for Tropical Timber Certificationn. Washington, DC: World Bank, 1995.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVarangis, Panayotis N., et al. Is There a Commercial Case for Tropical Timber Certificationn. World Bank, 1995.
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