Cable News Network, Red Envelope Entertainment (Firm), Cooper, A., Gupta, S., & Corwin, J. (2008). Planet in peril (Widescreen version.). Warner Home Video.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCable News Network, Red Envelope Entertainment (Firm), Anderson Cooper, Sanjay Gupta, और Jeff Corwin. Planet in Peril. Widescreen version. Burbank, CA: Warner Home Video, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCable News Network, et al. Planet in Peril. Widescreen version. Warner Home Video, 2008.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.