Sumi, K. (2017) “Reliability and construct validity of the Gratitude Questionnaire 6 Item Form (GQ 6) in a sample of Japanese college students”, Journal of Positive Psychology and Wellbeing, 1(2), pp. | 73-84 |. Available at: http://journalppw.com/index.php/JPPW/article/view/11 (Accessed: 21January2019).