Hakan ÖNAL, Hakan KOÇ, and Abdulkadir ERGÜN. 2016. “HOW AND WHAT LEVEL ARE THE GEOGRAPHICAL ELEMENTS USED IN SECONDARY SCHOOL HISTORY COURSE BOOKS?”. International Journal of Eurasia Social Sciences 7 (25):99-117. https://rrpubs.com/index.php/ijoess/article/view/864.