McGuire, Adam P, Thane M Erickson, Christina M Quach, and Brittany Willey. 2018. “Gratitude for Better or Worse: Differential Predictors and Affective Outcomes of State Gratitude in Positive and Negative Contexts”. Journal of Positive Psychology and Wellbeing 3 (2), 99-111. http://journalppw.com/index.php/JPPW/article/view/91.