1. Bachman, L. F. 1990. Fundamental Considerations in Language Testing. Oxford: Oxford University Press.
2. Baker Smemoe, W. & Haslam, N. 2013. The Effect of Language Learning Aptitude, Strategy Use and Learning Context on L2 Pronunciation Learning. Applied Linguistics 34(4): 435-456, https://doi.org/10.1093/applin/ams066
3. Carroll, J.B. & Sapon, S. 1959. Modern Language Aptitude Test. New York: The Psychological Corporation.
4. Carroll, J. B. 1965. The prediction of success in intensive foreign language training. In R. Glaser (ed.), Training, Research, and Education, 87−136. Pittsburgh, PA: University of Pittsburgh Press.
5. Carroll, J. B. 1981. Twenty five years of research on foreign language aptitude. In K. C. Diller (ed.), Individual Differences and Individual Differences and Universals in Language Learning Aptitude, 83−118. Rowley, MA: Newbury House.