1. Alagumalai, S., & Curtis, D. D. (2005). Classical test theory. In R. Maclean, R. Watanabe, R. Baker, Boediono, Y. C. Cheng, W. Duncan, J. Keeves, Z. Mansheng, C Power, J. S. Rajput, K. H. Thaman, S. Alagumalai, D. D. Curtis & N. Hungi (Eds.), Applied Rasch measurement: A book of exemplars (pp. 1-14). Springer.
2. Anantapol, W., Keeratikorntanayod, W., & Chobphon, P. (2018). Developing English proficiency standards for English language teachers in Thailand. Humanities Journal, 25(2), 1-35.
3. Borger, L. (2019). Assessing interactional skills in a paired speaking test: Raters’ interpretation of the construct. Apples: Journal of Applied Language Studies, 13(1), 151-174.
4. Brunfaut, T., & Harding, L. (2014). Linking the GEPT listening test to the Common European Framework of Reference. LTTC-GEPT Research Reports RG-05, 1-75.
5. Cheewasukthaworn, K. (2022). Developing a standardized English Proficiency Test in alignment with the CEFR. PASAA: Journal of Language Teaching and Learning in Thailand, 63, 66-92.