Farista, N., D. Anggani Linggar Bharati, and S. Wuli Fitriati. “The Effectiveness of Roundtable and One Stay Two Strays Techniques to Teach Speaking Skill to Students With High and Low Self-Confidence”. English Education Journal, Vol. 8, no. 2, Feb. 2018, pp. 130-7, doi:10.15294/eej.v8i3.21350.