Quách, T. A. (2009). The impact of students' preferred speaking motivation and speaking ability: Master Thesis - Major: Principles and Methods in English Language Education. Can Tho: Can Tho University.

Quách, Tấn An. The Impact of Students' Preferred Speaking Motivation and Speaking Ability: Master Thesis - Major: Principles and Methods in English Language Education. Can Tho: Can Tho University, 2009.

Quách, Tấn An. The Impact of Students' Preferred Speaking Motivation and Speaking Ability: Master Thesis - Major: Principles and Methods in English Language Education. Can Tho: Can Tho University, 2009.