Works Cited
Couper, Heather and Nigel Henbest. Black Holes. New York: DK Publishing, 1996.
Strathern, Paul. The Big Idea Hawking and Black Holes. New York: Doubleday, 1997.
Thorne, Kip S. Black Holes and Time Warps. New York: W.W. Norton & Co., 1994.