Daşcı Sönmez, E. ., and T. Gökmenoğlu. “Development and Validation of the Professional Development Needs Scale: Evidence from Turkish School Principals”. Psycho-Educational Research Reviews, vol. 12, no. 2, Aug. 2023, pp. 442-58, doi:10.52963/PERR_Biruni_V12.N2.06.