http://e-repository.perpus.iainsalatiga.ac.id/17480
http://e-repository.perpus.iainsalatiga.ac.id/18273
http://e-repository.perpus.iainsalatiga.ac.id/19084
http://e-repository.perpus.iainsalatiga.ac.id/19409
http://e-repository.perpus.iainsalatiga.ac.id/19573