SUMINTA, Rini Risnawita; SALEH, Akhmad Hasan. Conceptualization of Gratitude : Qualitative and Quantitative Approach. Happiness: Journal of Psychology and Islamic Science, [S. l.], v. 5, n. 1, p. 1–17, 2021. DOI: 10.30762/happiness.v5i1.372. Disponível em: http://103.134.17.251/happiness/article/view/372. Acesso em: 1 july. 2026.