Latifah, M., I. Saripah, D. Suryana, and Y. Sunarya. “Validity and Reliability of Self-Concept Instrument Using Rasch Model”. Jurnal Kajian Bimbingan Dan Konseling, vol. 9, no. 1, June 2024, pp. 26-35, doi:10.17977/um001v9i12024p26-35.