Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

1877-0428 © 2013 The Authors. Published by Elsevier Ltd.Selection and peer-review under responsibility of The Association of Science, Education and Technology-TASET, Sakarya Universitesi, Turkey.doi: 10.1016/j.sbspro.2013.12.073

ScienceDirectAvailable online at www.sciencedirect.com

© 2013 The Authors. Published by Elsevier Ltd.Selection and peer-review under responsibility of The Association of Science, Education and Technology-TASET, Sakarya Universitesi, Turkey.

642 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

643 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

644 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

645 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

646 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

647 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

648 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

649 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650

650 Bilgehan Gü ltekin and Tuba Gü ltekin / Procedia - Social and Behavioral Sciences 106 ( 2013 ) 641 – 650