Luttrell, Andrew, Richard E. Petty, and Pablo Briñol. “The Interactive Effects of Ambivalence and Certainty on Political Opinion Stability”. Journal of Social and Political Psychology 8, no. 2 (September 30, 2020): 525-541. Accessed May 8, 2021. https://jspp.psychopen.eu/index.php/jspp/article/view/5259.