P. D. S. Ayu, H. Hidayatullah, and S. Ariani, “Applying Circle Game to Enhance Students’ Speaking Skill”, J. Engl. Lang. Teach. Fak. Pendidik. Bhs. Seni Program Studi Pendidik. Bhs. Ingg. IKIP Mataram, vol. 7, no. 2, pp. 119–124, Dec. 2020.