http://e-repository.perpus.iainsalatiga.ac.id/20961
http://e-repository.perpus.iainsalatiga.ac.id/18647
http://e-repository.perpus.iainsalatiga.ac.id/18441
http://e-repository.perpus.iainsalatiga.ac.id/18767
http://e-repository.perpus.iainsalatiga.ac.id/18460