Ciesielkiewicz, Monika, et al. , translators. “Intrinsic Motivational Factors in the Use of EPortfolios by Students in Master’s Degree Programs in Education”. Revista Electrónica Educare, vol. 25, no. 2, Mar. 2021, pp. 1-14, https://doi.org/10.15359/ree.25-2.7.