van Tubergen, G. Norman, and Robert A. Olins. “Reflections on a Test for Construct Validity in Some Q Typologies”. Operant Subjectivity 6, no. 1 (October 1, 1982). Accessed July 3, 2024. https://ojs.library.okstate.edu/osu/index.php/osub/article/view/9233.