McGuire, A. P., Erickson, T. M., Quach, C. M. and Willey, B. (2018) “Gratitude for Better or Worse: Differential Predictors and Affective Outcomes of State Gratitude in Positive and Negative Contexts”, Journal of Positive School Psychology , 3(2), pp. 99-111. Available at: http://journalppw.com/index.php/JPPW/article/view/91 (Accessed: 22September2020).