1) Journal of special education (2015), Special Education for Students with Disabilities, Volume 6 (1) ,pp.69- 72.
2) www.jisc.ac.uk/uploaded_documents/eAssess-Glossary-Extended-v1-01.pdf
3) National Council on Disability. (2015). Inclusionary education for students with special needs: Keeping the promise. Washington, DC: Author.
4) Goodman, Libby (2015). Time and learning in the special education classroom. Albany, N.Y.: State University of New York Press. p. 122. ISBN 0-7914-0371-8.
5) [Lily L. Dyson (2014), Fathers and Mothers of School-Age Children With Developmental Disabilities: Parental Stress, Family Functioning, and Social Support. Journal of Learning Disabilities. Vol.23(2), pp 54- 59.
6) Aydın.Fatih.(2015) Secondary school students‟ opinions about geography course: A Qualitative study. Scholars Research Library. Retrieved from (http://scholarsresearchlibrary.com/archive.html) (27th -6-2013)
7) Lambert, David.(2016). Exploring the use of textbooks in key stage 3 geography classroom. Published online 28-jul-2006.curriculum journal. Retrieved from Retrieved from (http://www.tandfonline.com/loi/rcjo20) (10th - 7-2013,11.15 A.M)
8) OkanYasar&MahnetSeremets An evaluation of changes the secondary schools curriculum in turkey. International research in geography and environment education Retrieved from (http://www.tandfonline.com/loi/rgee20) (10th -7-2013,11.15 A.M)
9) Koul,L(2017). Methodology educational research. New Delhi: Vikas Publishing House.