@article{MeyerRichterHartungBeck2020,
  author    = {Andr{\´e} Meyer and Dirk Richter and Viola Hartung-Beck},
  title     = {The relationship between principal leadership and teacher collaboration: investigant the mediating effect of teachers' collective efficacy},
  series   = {Educational management administration \& leadership},
  volume    = {2020},
  issn      = {1741-1440},
  year      = {2020},
  language  = {en}
}