Haristanto, B. (2015). The Use of Information Gap Technique to Improve Students’ Speaking Ability (A Classroom Action Research in the Second Year Students of SMP Negeri 1 Tumpang in the Academic Year 2014/2015).

Haristanto, Bhayu. The Use of Information Gap Technique to Improve Students’ Speaking Ability (A Classroom Action Research in the Second Year Students of SMP Negeri 1 Tumpang in the Academic Year 2014/2015). 2015.

Haristanto, Bhayu. The Use of Information Gap Technique to Improve Students’ Speaking Ability (A Classroom Action Research in the Second Year Students of SMP Negeri 1 Tumpang in the Academic Year 2014/2015). 2015.