1.
Cotton D, Falvey D, Kent S. New Language Leader: Intermediate Coursebook. 2 ed. Harlow: Pearson Education Limited; 2014.
2.
Cunningham S, Bowler B. New headway pronunciation: student’s practice book, Intermediate. Oxford: Oxford University Press; 2005.
3.
Cunningham S, Moor P. New headway pronunciation: elementary. Oxford: Oxford University Press; 2011.
4.
Lebeau I, Rees G. Language leader coursebook and CD-ROM: pre-intermediate. Harlow: Pearson Education; 2008.
5.
Murphy R, Smalzer WR, Chapple J. Basic grammar in use student’s book with answers: self-study reference and practice for students of American English. Fourth edition. Cambridge: Cambridge University Press; 2017.
6.
Phillips T, Phillips A, Regan N. New skills in English: level 1 : course book. Reading: Garnet Education; 2011.
7.
"Phillips, T. & Phillips, A. New skills in English combined edition Level 2. Reading: Garnet.". 2009.
8.
Redman S. English vocabulary in use: Pre-intermediate and intermediate. 2nd ed. Cambridge: Cambridge University Press; 2005.
9.
Swan M. Practical English usage. 4th ed. Oxford: Oxford University Press; 2016.
10.
Longman dictionary of contemporary English: for advanced learners. 6th edition. Harlow: Pearson Education Limited; 2014.
11.
Murphy R, Murphy R. Essential grammar in use: a self-study reference and practice book for elementary students of English : with answers. 3rd ed. Cambridge: Cambridge University Press; 2007.
12.
Murphy R. English grammar in use: a self-study reference and practice book for intermediate learners of English. Fifth edition. Cambridge: Cambridge University Press; 2019.
13.
Dictionary.com - Find the Meanings and Definitions of Words at Dictionary.com [Internet]. Available from: http://dictionary.reference.com/
14.
BBC World Service [Internet]. Available from: http://www.bbc.co.uk/worldservice/
15.
Sky News [Internet]. Available from: http://news.sky.com/skynews/
16.
CNN [Internet]. Available from: http://edition.cnn.com/?fbid=pX_grVUROqW
17.
BBC - Radio 4 [Internet]. Available from: http://www.bbc.co.uk/radio4/
18.
Randall’s ESL Cyber Listening Lab - For ESL/EFL Students [Internet]. Available from: http://www.esl-lab.com/
19.
Interesting Things for ESL/EFL Students (Fun English Study) [Internet]. Available from: http://www.manythings.org/
20.
English Listening Lounge [Internet]. Available from: http://www.englishlistening.com/
21.
EFL.NET Improve your English [Internet]. Available from: http://www.efl.net/
22.
Sounds of English [Internet]. Available from: http://www.soundsofenglish.org/