Chaffee, John
Thinking critically
Wadsworth/Clengage Learning , 2012
 Buku Teks
Fearnside, W. Ward
About thinking
Prentice-Hall, 1997
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Ethical issues in journalism and the media
edited by Andrew Belsey and Ruth Chadwick
Routledge, 1995
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Kimmel, Allan J.
Ethical issues in behavioral research
Blackwell Publishing, 2007
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Ethical issues in accounting
edited by Catherine Gowthorpe and John Blake
Routledge , 1998
 Buku Teks