http://e-repository.perpus.iainsalatiga.ac.id/7985/
http://e-repository.perpus.iainsalatiga.ac.id/8265
http://e-repository.perpus.iainsalatiga.ac.id/9003
http://e-repository.perpus.iainsalatiga.ac.id/8993
http://e-repository.perpus.iainsalatiga.ac.id/8991