HERMANTO, and ANGEL PURWANTI. “PENGARUH KOMUNIKASI INTERPERSONAL TERHADAP TINGKAT LOYALITAS PELANGGAN”. JURNAL EKONOMI, SOSIAL & HUMANIORA, Vol. 1, no. 12, July 2020, pp. 49-59, https://jurnalintelektiva.com/index.php/jurnal/article/view/196.