http://e-repository.perpus.iainsalatiga.ac.id/18139
http://e-repository.perpus.iainsalatiga.ac.id/19109
http://e-repository.perpus.iainsalatiga.ac.id/18538
http://e-repository.perpus.iainsalatiga.ac.id/19016
http://e-repository.perpus.iainsalatiga.ac.id/17794