KARDAŞ, F., M. EŞKİSU, Z. ÇAM, and M. TAYTAŞ. “Development and Validation of the Grit Scale: Test of Measurement Invariance across University and High School Students”. International Journal of Psychology and Educational Studies, vol. 9, no. 3, July 2022, pp. 571-88, doi:10.52380/ijpes.2022.9.3.626.