Cohen, Jack
The Collapse of chaos: discovering simplicity in a complex world
Penguins Books, 1994
 Buku Teks
Krogh, David
Biology : a guide to the natural world
Pearson, 2009
 Buku Teks
Cotterill, Rodney
The Cambridge guide to the material world
Cambridge University Press, 1989
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New horizons world guide
edited by Gerald W. Whitted
Pan American World Airways, 1971
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Shore, Peter
A guide to the world's radio stations
Bernard Babani, 1995
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