Kiriakidis, P., Decosta, J.W. și Sandu, A. (2011) „What is the effect of grade point average (GPA) on courses taken either face-to-face or online by undergraduate working adult students?”, Revista de Cercetare si Interventie Sociala, 33, pp. 7–26. Disponibil la: https://www.rcis.ro/journal/article/view/338-what-is-the-effect-of-grade-point-average-gpa-on-courses (Data accesării: 7 noiembrie 2026).