Electronic/World Wide Web>Internet Article:  Brand, Stewart (21 April 2015), Rethinking extinction, Retrieved on 2015-05-23

Source Material [aeon.co]

Electronic/World Wide Web>Internet Article:  KETCHAM, CHRISTOPHER (APRIL 9, 2015), What the Deer Are Telling Us, Retrieved on 2015-04-09

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Books, Brochures, and Chapters>Book:  Carson , Rachel (2002), Silent Spring, Houghton Mifflin Harcourt, Retrieved on 2015-03-07

Source Material [books.google.com]

Audiovisual Media>Motion Picture:  Jing, Chai (Mar 1, 2015), Under the Dome – Investigating China’s Smog, Retrieved on 2015-03-07

Source Material [www.youtube.com]

Books, Brochures, and Chapters>Book:  Fuller, R. Buckminster (Richard Buckminster) and Snyder, Jaime (2008-09-03), Operating Manual for Spaceship Earth, Lars Muller Publishers, Retrieved on 2013-10-01

Source Material [books.google.com]

Periodicals>Newspaper Article:  Clarkson, Jeremy (22 Dec 2002), Seat Leon Cupra SR1, The Times, Retrieved on 2012-01-31

Books, Brochures, and Chapters>Book:  Bukowski , Charles (2002-05-31), The Last Night of the Earth Poems, Ecco, Retrieved on 2011-10-18

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Books, Brochures, and Chapters>Book:  Fuller , R. Buckminster (2008), Grunch of Giants, Design Science, Retrieved on 2011-06-01

Books, Brochures, and Chapters>Book:  Lovelock, James (2000-11-23), Gaia: A New Look at Life on Earth, Oxford University Press, USA, Retrieved on 2011-04-11