http://e-repository.perpus.iainsalatiga.ac.id/18742
http://e-repository.perpus.iainsalatiga.ac.id/18480
http://e-repository.perpus.iainsalatiga.ac.id/18833
http://e-repository.perpus.iainsalatiga.ac.id/18435
http://e-repository.perpus.iainsalatiga.ac.id/18672