Lalana Saengsupan. (2011) A study of the relationship between the internet using behavior and English proficiency of Mathayom Suksa 5 students in Muang district, Nakhon Sawan province /. Naresuan University,:ม.ป.ท.Lalana Saengsupan. 2011. A study of the relationship between the internet using behavior and English proficiency of Mathayom Suksa 5 students in Muang district, Nakhon Sawan province /. ม.ป.ท.:Naresuan University,;Lalana Saengsupan. A study of the relationship between the internet using behavior and English proficiency of Mathayom Suksa 5 students in Muang district, Nakhon Sawan province /. ม.ป.ท.:Naresuan University, 2011. Print.