1. Allen, I. E., & Seaman, J. (2015). Grade level: tracking online education in the United States.
2. Berdan, S., & Johannes, W. (2014). What will it take to double study abroad? New York. Retrieved from http://www.iie.org/Research-and-Publications/Publications-and-Reports/IIE-Bookstore/What-Will-It-Take-To-Double-Study-Abroad
3. Berk, R. A. (2005). Survey of 12 strategies to measure teaching effectiveness. International Journal of Teaching and Learning in Higher Education, 17(1), 48–62.
4. Chieffo, L., & Griffiths, L. (2004). Large-scale assessment of student attitudes after a short-term study abroad program. Frontiers: The Interdisciplinary Journal of Study Abroad, 10, 165–177.
5. Deardorff, D. K. (2006). Identification and assessment of intercultural competence as a student outcome of internationalization. Journal of Studies in International Education, 10(3), 241–266 http://doi.org/10.1177/102831530628700 .