Robayo, Lucimaver González, and Alberto Ramírez Avendaño. “Exploring the Principles of Construct and Content Validity Presented in the Tests of the Textbook English Unlimited”. Enletawa Journal, no. 5 (June 13, 2014). Accessed August 16, 2024. https://revistas.uptc.edu.co/index.php/enletawa_journal/article/view/2576.