Theodore, M. K., & Theodore, L. (1996). Major environmental issues facing the 21st century. Prentice Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTheodore, Mary K., और Louis Theodore. Major Environmental Issues Facing the 21st Century. Upper Saddle River, NJ: Prentice Hall, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTheodore, Mary K., और Louis Theodore. Major Environmental Issues Facing the 21st Century. Prentice Hall, 1996.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.