Listiyandini, R.A., Nathania, A., Syahniar, D., Sonia, L. and Nadya, R. 2015. Measuring gratitude: The preliminary development of the Indonesian Gratitude Scale. Jurnal Psikologi Ulayat. 2, 2 (Dec. 2015), 473–496. DOI:https://doi.org/10.24854/jpu39.