Widhiyarti, E., and I. Ismiyati. “PERAN HUBUNGAN MASYARAKAT (HUMAS) DI SMK PALEBON SEMARANG”. Economic Education Analysis Journal, Vol. 6, no. 2, Aug. 2017, pp. 392-07, https://journal.unnes.ac.id/sju/eeaj/article/view/16431.