@article{
  author = {Farhadfar, Mozhgan, delkhosh kasmayi, abolghasem, Safari, Mahmoud},
  title = {Providing a Model to develop a model for school principals based on a competency-based approach  (Case Study: Tehran Secondary School},
  journal = { Quarterly Journal of Training and Development of Human Resources},
  year = {2021},
  volume = {8},
  number = {30},
  pages = {73-108},
  doi = {10.52547/istd.31103.8.30.73}
}