52 REFERENCES
Ali, Mohamad. (1993). P enelitian Kependidikan. Bandung: Angkasa
Arikunto, Suharsimi. (1998). Prosedure penelitian: Suatu Pendekatan Praktik. Jakarta: Rineka Cipta.
Brown, H. Douglas. (1987). Educational Technology. Retrived on July, 19 2016 From http://www.shvoong.com.3.
Brown, H. Douglas. (2000). Principle of Language Teaching and Learning. NewYork: Pearson Education.
Brown, H. Douglas. (2001). Principles of Language and Teaching. SanFransisco: Longman.
Maleong, LexyJ. (1991). Metodology Penelitian Kualitatif. Bandung: PT. Remaja Rosda Karya.
Skinner, B.F. (1953). Science and Human Behavior. Retrived on August, 13 2016 From http://www.referenceforbusiness.com?management/P r-Sa/Reinforcement-Theory.html
Skinner, B.F.(1953). Science and Human Beahvior, Macmilan, New York in, Sydney Micro Skills Redeveloped, University of Sydney, Turney, C., et al.
Skinner, B.F.(1953). Desperately Seeking: Positive Reinforcement. Retrived on August, 13 2016 From http://verywell.com/what-is-positive-reinforcement-2795412
Supranto. (2003). Petunjuk Penulisan Proposal dan Tesis. Yogyakarta: Program Pascasarjana Universitas Gajah Mada.
Samodra, Ala.Opini. 2014. The Reinforcement Used by The Student Teacher in Academic Year 2013/2014 in Teaching Practice at MTS N 1 Kudus. Kudus: Muria Kudus University.
Turney, C., et al. (1983) Sydney Micro Skills Redeveloped.Sydney: University of Sydney
http://www.buzzle.com/articles/positive-reinforcement-in-the-classroom.html. (2016). retrived on May 11th.
http://www.ttacnews.vcu.edu/2010/01/reinforcement-in-the-classroom-improves-student-motivation-and-performance/. (2016) retrived on May 11th.
