Scientific Research and Essays 1992-2248 Academic Journals 10.5897/SRE11.1372 Bilge Akdeniz Dilek Demirbuuml;ker Kavak Neriman Badatliolu * E-mail: 477-489 2012 30 01 2012 10 01 2012 7 4 477 489 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/SRE/article-abstract/B64554430002 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/SRE/article-full-text-pdf/B64554430002