Nur Azizah, Nadia, AND Imran, Ayub. " Proses Public Relations PT. Kereta Api Indonesia (Persero) dalam Membangun Citra Positif melalui Media Sosial Instagram @Keretaapikita" Performance: Jurnal Personalia, Financial, Operasional, Marketing dan Sistem Informasi [Online], Volume 26 Number 1 (18 January 2019)