Pengaruh proporsi komisaris independen, efektivitas komite audit, kualitas audit eksternal dan pengungkapan Islamic social reporting terhadap nilai perusahaan: studi empiris pada perusahaan yang terdaftar dalam indeks saham syariah Indonesia = The influence of the proportion of independent commissioners, audit committee effectiveness, an external auditors quality and the disclosure of Islamic social reporting on company value: empiric study at Indonesia sharia stock index