ข้อสอบนี้มีความเป็นสากลและได้รับการยอมรับจากสถาบันต่างๆฃ
IELTS has continued to be adopted by many companies and institutions
Criper and Davies (1988: 99) state that face validity is high due to the modular approach of IELTS which is very popular among subject speciali
the test itself has evolved considerably and further research into this area could well prove to be a fruitful exercise.