http://e-repository.perpus.iainsalatiga.ac.id/18319
http://e-repository.perpus.iainsalatiga.ac.id/17463
http://e-repository.perpus.iainsalatiga.ac.id/17821
http://e-repository.perpus.iainsalatiga.ac.id/16187
http://e-repository.perpus.iainsalatiga.ac.id/16168