[1]
S. Suhardianto, E. Martiningsih, P. J. Pattiasina, and S. Shaumiwaty, “The Influence of Learning Motivation, Vocabulary Mastery, Self-Confidence, and Classroom Interaction on Students’ English-Speaking Ability”, IETI, vol. 4, no. 1, pp. 19-29, Jul. 2026.