Mauludin, M.S. et al. 2019. PERANCANGAN IMPLEMENTASI FRAMEWORK CODEIGNITER PADA CRM (CUSTOMER RELATIONSHIP MANAGEMENT) MENGGUNAKAN WHATSAPP-MARKETING BERBASIS WEB. Prosiding Sains Nasional dan Teknologi. 1, 1 (Aug. 2019). DOI:https://doi.org/10.36499/psnst.v1i1.2867.