Suparuthai Sumonwiriya. 2007. A comparison of out-of-class English language learning activities, learning strategies, and attitudes towards autonomous English language learning of English program and regular program students in secondary schools. Field of Study Teaching English as a Foreign Language, Chulalongkorn University;

Suparuthai Sumonwiriya. A comparison of out-of-class English language learning activities, learning strategies, and attitudes towards autonomous English language learning of English program and regular program students in secondary schools. . Bangkok:Chulalongkorn University, 2007.

Suparuthai Sumonwiriya. (2007) A comparison of out-of-class English language learning activities, learning strategies, and attitudes towards autonomous English language learning of English program and regular program students in secondary schools . Chulalongkorn University/Bangkok.