Safitri, S., D. Kusumawardani, C. Wiguna, D. Supriyadi, and I. Yulita. “MEASUREMENT OF VALIDITY AND RELIABILITY OF CUSTOMER SATISFACTION QUESTIONER in E-BOARDING APPICATIONS”. Jurnal Pilar Nusa Mandiri, Vol. 16, no. 1, Mar. 2020, pp. 1-6, doi:10.33480/pilar.v16i1.1069.