1. Anderson, T. H., & Armbruster, B. B. (1984). Content area textbooks. In R. C. Anderson, J. Osborn, & R. J. Tierney (Eds.), Learning to read in American schools (pp. 193–224). Hillsdale, NJ: Erlbaum.
2. Baddeley, A. D. (2001). Is working memory still working? American Psychologist, 56(11), 851–864.
3. Baddeley, A. D., & Hitch, G. J. (1974). Working memory. In G. H. Bower (Ed.), The psychology of learning and motivation (Vol. 8, pp. 47–90). New York: Academic Press.
4. Baron, N, S. (2014). How e-reading threatens learning in the humanities. The Chronicle of Higher Education. Retrieved from: http://chronicle.com/article/How E-Reading-threatens/147661/?Cid=at&utm_source=at&utm_medium=en.
5. Berg, H., & Dawson. (2010). Not on the same page. Undergraduates’ Information retrieval in electronic and print books., 36(6), 518–525.