Dang, T. B. L., & Ngo, A. T. (2011). Using warm-up activities in teaching and learning English in grade 11 at Cao Lanh High school: Problems and solutions: B.A Thesis. Major: English Pedagogy. Degree: Bachelor of Art. Dong Thap: Dong Thap University.

Dang, Thi Bich Loan, και Ai Tuong Ngo. Using Warm-up Activities in Teaching and Learning English in Grade 11 At Cao Lanh High School: Problems and Solutions: B.A Thesis. Major: English Pedagogy. Degree: Bachelor of Art. Dong Thap: Dong Thap University, 2011.

Dang, Thi Bich Loan, και Ai Tuong Ngo. Using Warm-up Activities in Teaching and Learning English in Grade 11 At Cao Lanh High School: Problems and Solutions: B.A Thesis. Major: English Pedagogy. Degree: Bachelor of Art. Dong Thap: Dong Thap University, 2011.