1. Foreign language teaching in higher education in Europe: Implications for Turkey;Arslan;International Journalof English and Education,2013
2. Council of Europe (2006), Survey on CEFR synthesis of results. DGIV, EDU, LANG. Retrieved on February, 15, 2016, from. https://www.coe.int/t/dg4/../Surveyresults.pdf.
3. Demirel, ÿ. (2005). Avrupa Konseyi dil projesi ve Türkiye uygulaması. Milli EĿitim Dergisi, 167. Retrieved on February, 15, 2016,from. http://dhgm.meb.gov.tr/yayimlar/dergiler/Milli_Egitim_Dergisi/167/index3-demirel.htm.
4. Elder, C. & OLoughlin, K. (2007). ELICOS Language Levels Feasibility Study Final Report. Canberra: Department of Education, Science & Training.