Studi komparasi pengaruh ciri dan perilaku kepemimpinan terhadap efektifitas kepemimpinan dalam organisasi pengelola zakat di Indonesia studi kasus : PKPU dan dompet dhuafa Republika = The influence of the leadership characteristic and behaviour to the leadership effectiveness in the zakah management institutiOn in Indonesia. Case study : PKPU and Dompet Dhuafa Republika