References

Fromkin, V., Rodman, R. and N. Hyams. (2014). Introduction to language, 10th ed.

            United States: Wadsworth, Cengage Leraning.

MARTÍN, M. F. (2008). English Made in Brazil . Retrieved from Sponsor Brazil's best ESL site: http://www.sk.com.br/sk-krash-english.html

Saville, M. (2006). Cambridge. Retrieved from Cambridge Universite Press: https://elt502ciu.wikispaces.com/file/view/Introducing+Second+Language+Acquisition.pdf