Dick, Steven J.
The biological universe: the twentieth-century extraterrestrial life debate and the limits of science
Cambridge University Press, 1996
 Buku Teks
Berliner, Baruch
Limits of insurability of risks
Prentice-Hall, 1982
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Krishnamurti, Jiddu, 1895-1986
The limits of thought discussions
New York Routledge , 1999
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Creating learning without limits
by Mandy Swann [and others]
McGraw-Hill, 2012
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Sandel, Michael J.
Liberalism and the limits of justice
Cambridge University Press, 2010
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