Gleed, A. (2013). Booktrust Reading Habits Survey 2013. A national survey of reading habits and attitudes to books amongst adults in England. Last accessed May 10 2015. http://www.booktrust.org.uk/usr/library/documents/main/1576-booktrust-reading-habits-report-final.pdf
Hampel, R., & Stickler, U. (Eds.). (2015). Developing Online Language Teaching. Research-Based Pedagogies and Reflective Practices. Basingstoke: Palgrave Macmillan.
Wasylewicz, M. (2014). Książka papierowa czy elektroniczna – preferencje czytelnicze dzieci i rodziców w dobie ekspansji nowych technologii. Last accessed May 10, 2015. http://www.ktime.up.krakow.pl/symp2014/referaty_2014_10/wasylewicz.pdf
Zickuhr, K. & Rainie L. (2014). A Snapshot of Reading in America in 2013. Last accessed May 10, 2015. http://www.pewinternet.org/2014/01/16/a-snapshot-of-reading-in-america-in-2013/