E. Jamil, N. A. Ishak, A. D. Abdullah, Z. Hashim, and P. S. Saaban, “Designing and Validating a CEFR-Aligned Speaking Rubric for Rural Primary ESL Learners”, EJOSS, vol. 12, no. Special Issue, pp. 100–106, Jan. 2026, doi: 10.37134/ejoss.vol12.Sp.12.2026.