Nur’Ahya Anisa, Y. Yuliazmi, and Grace Gata. “Application of E-CRM in Salon Business in Increasing Loyalty and Service to Customers”. Jurnal RESTI (Rekayasa Sistem Dan Teknologi Informasi), Vol. 4, no. 2, Apr. 2020, pp. 268 -75, doi:10.29207/resti.v4i2.863.