Scientific Research and Essays 1992-2248 Academic Journals 10.5897/SRE2014.5929 Birol Akyz Safa ?enaysoy * E-mail: birol.akyuz@bilecik.edu.tr 2015 30 01 2015 14 04 2014 25 11 2014 10 2 71 78 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/2A15B5A49797 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/SRE/article-full-text-pdf/2A15B5A49797 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21