Ningrattama, Ikhwan, and Ari Nurul Alfian. “Pengembangan Chatbot Informasi PPDB KB & TK As Salam Menggunakan TF-IDF Dan Cosine Similarity”. CHAIN: Journal of Computer Technology, Computer Engineering, and Informatics 4, no. 4 (October 1, 2026): 593-605. Accessed September 23, 2026. https://ejournal.techcart-press.com/index.php/chain/article/view/400.