1. Beglar, D., & Nemoto, T. (2014). Developing Likert-scale questionnaires. JALT2013 Conference Proceedings, 1–8.
2. Bryman, A. (2012). Social Research Methods (Fourth edi).
3. CES, C. de E. S. (2019). Reglamento de Régimen Académico. In Angewandte Chemie International Edition, 6(11), 951–952.
4. Creswell, J. (2012). Educational Research. In Pearson Education (Fourth edi).
5. Doyle, L., Brady, A. M., & Byrne, G. (2009). An overview of mixed methods research. Journal of Research in Nursing, 14(2), 175–185. https://doi.org/10.1177/1744987108093962