Hasanah, R., and M. Kosandi. “THE RESISTANCE MOVEMENT OF INDONESIAN RAILWAYS WORKERS UNION (SPKA) AGAINST PT. KERETA API (PERSERO) IN POST REFORM”. PEOPLE: International Journal of Social Sciences, vol. 3, no. 2, Oct. 2017, pp. 1175-91, doi:10.20319/pijss.2017.32.11751191.