M.Pınar BABANOĞLU, and Reyhan AĞÇAM. “A COMPARATIVE STUDY ON EFL TEXTBOOKS IN TURKISH AND GERMAN SECONDARY PUBLIC SCHOOLS”. International Journal of Eurasia Social Sciences, vol. 9, no. 32, June 2018, pp. 948-59, https://rrpubs.com/index.php/ijoess/article/view/1077.