http://e-repository.perpus.iainsalatiga.ac.id/20067
http://e-repository.perpus.iainsalatiga.ac.id/19997
http://e-repository.perpus.iainsalatiga.ac.id/14699
http://e-repository.perpus.iainsalatiga.ac.id/19122
http://e-repository.perpus.iainsalatiga.ac.id/17968