Huỳnh, V. H. (2015). EFL teachers’ difficulties in response to achieving level C1 in the Vietnamese six-level framework of reference for foreign languages: Master of education. Program: Principles and methods in English language education. Can Tho: Can Tho Unisersity.

Huỳnh, Văn Hữu. EFL Teachers’ Difficulties in Response to Achieving Level C1 in the Vietnamese Six-level Framework of Reference for Foreign Languages: Master of Education. Program: Principles and Methods in English Language Education. Can Tho: Can Tho Unisersity, 2015.

Huỳnh, Văn Hữu. EFL Teachers’ Difficulties in Response to Achieving Level C1 in the Vietnamese Six-level Framework of Reference for Foreign Languages: Master of Education. Program: Principles and Methods in English Language Education. Can Tho: Can Tho Unisersity, 2015.