Sell, Deborah K., and Richard B. Craig. “The Use of Q Methodology to Investigate Attitude Change in American Students Who Participate in Foreign Study Programs: A Review of the Literature”. Operant Subjectivity 7, no. 1 (October 1, 1983). Accessed June 30, 2024. https://ojs.library.okstate.edu/osu/index.php/osub/article/view/9215.