Sujito, S., and W. M. Mauttagien. “APPLICATION OF COLLABORATIVE PROBLEM-BASED LEARNING TO IMPROVE THE QUALITY OF TEACHING AND LEARNING ON APPLIED LINGUISTICS”. IJOTL-TL: Indonesian Journal of Language Teaching and Linguistics, Vol. 1, no. 3, Sept. 2016, pp. 193-02, doi:10.30957/ijoltl.v1i3.184.