Somsri Udomsamuthirun. 1998. A study of the relationship between selected learner variables and the English language achievement of first-year medical students of Mahidol University. Faculty of Graduate Studies, Mahidol University;

Somsri Udomsamuthirun. A study of the relationship between selected learner variables and the English language achievement of first-year medical students of Mahidol University. . Bangkok:Mahidol University, 1998.

Somsri Udomsamuthirun. (1998) A study of the relationship between selected learner variables and the English language achievement of first-year medical students of Mahidol University . Mahidol University/Bangkok.