Ariyando, A., N. Susanti, and M. Heriyanti. “The Effect of Communication and Work Spirit on the Effectiveness of Employee Performance at Work Training Center in Seluma Regency”. Jurnal Fokus Manajemen, Vol. 1, no. 1, May 2021, pp. 14-21, https://jurnal.unived.ac.id/index.php/fokusman/article/view/1736.