William, M.J.D. et al. 2024. Enhancing students’ subject-verb agreement skill by using CiCi artificial intelligence-based app: Embedded mixed-methods study. HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - SOCIAL SCIENCES. 15, 2 (Oct. 2024), 162–179. DOI:https://doi.org/10.46223/HCMCOUJS.soci.en.15.2.3184.2025.