In Engelse versie
http://www.utm.edu/research/iep/a/aristotl.htmhttp://www.digischool.nl/kt/fil-aris.htmhttp://www.newadvent.org/cathen/01713a.htmhttp://plato.stanford.edu/entries/aristotle-politics/http://www.britannica.com/eb/article?eu=114501
http://ethics.sandiego.edu/theories/Aristotle/
http://www.quotationspage.com/quotes/Aristotlehttp://www.quoteland.com/author.asp?AUTHOR_ID=155http://www.epistemelinks.com/Main/MainQuot.aspx
http://plato.evansville.edu/public/burnet/http://graduate.gradsch.uga.edu/archive/Greek.htmlhttp://www.forthnet.gr/presocratics/indeng.htmhttp://www.rit.edu/~flwstv/presocratic.html
http://wings.buffalo.edu/AandL/Maecenas/general_contents.html
http://dir.yahoo.com/Arts/Humanities/Philosophy/Ethics/http://www.onlineethics.nlhttp://ethics.sandiego.edu
http://www.xrefer.com/entry/552900/http://www.epistemelinks.com/Main/MainEncy.aspxhttp://www.philosophypages.com