Brown, L. R. (2003). Plan B: Rescuing a planet under stress and a civilization in trouble. Orient Longman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBrown, Lester R. Plan B: Rescuing a Planet Under Stress and a Civilization in Trouble. Orient Longman, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBrown, Lester R. Plan B: Rescuing a Planet Under Stress and a Civilization in Trouble. Orient Longman, 2003.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.