Karlina, K., and A. Sudirman. “The Effect of Application Guessing Game Pic-Pow Strategy Towards Students’ Speaking Mastery at the First Class of SMA Mathla’ul Anwar Menes”. Journal of English Education Studies, Vol. 2, no. 2, Nov. 2019, pp. 116-29, doi:10.30653/005.201922.42.