Jandrabha Wongsbhindu. 1997. Thai graduate students' errors in written English. Bangkok:National Institute of Development Administration;
Jandrabha Wongsbhindu. (1997) Thai graduate students' errors in written English (รายงานผลงานวิจัย). National Institute of Development Administration:Bangkok.
Jandrabha Wongsbhindu. Thai graduate students' errors in written English. Bangkok:National Institute of Development Administration, 1997.
Jandrabha Wongsbhindu. (1997) Thai graduate students' errors in written English (รายงานผลงานวิจัย). National Institute of Development Administration:Bangkok.