RANCANG BANGUN SISTEM CHATBOT CUSTOMER SERVICE BERBASIS RETRIEVAL-AUGMENTED GENERATION PADA PLATFORM TELEGRAM (STUDI KASUS: MOB ENGLISH COURSE PARE KEDIRI). Kohesi [Internet]. 2026 Sep. 24 [cited 2026 Oct. 17];11(4). Available from: https://journal.cib.institute/index.php/kohesi/article/view/4476