Siaputra, Ide Bagus, et al. “Exploring the Usefulness of the Brief COPE in Clinical and Positive Psychology: A Discriminant Content Validity Study”. Psikohumaniora: Jurnal Penelitian Psikologi, vol. 8, no. 1, May 2023, pp. 163-80, doi:10.21580/pjpp.v8i1.15063.