Özgür ULUBEY, Kasım YILDIRIM, Muhammet Mustafa ALPASLAN, and Necdet AYKAÇ. “TEACHERS’ OPINIONS ABOUT PROFESSIONAL DEVELOPMENT SCHOOLS”. International Journal of Eurasia Social Sciences, vol. 8, no. 30, Dec. 2017, pp. 2064-82, https://rrpubs.com/index.php/ijoess/article/view/1028.