Cahyandari, Rini, et al. “Kajian Model Hidden Markov Dengan Empat State”. Prosiding Seminar Nasional Teknik Elektro UIN Sunan Gunung Djati Bandung, Nov. 2023, pp. 106-11, https://senter.ee.uinsgd.ac.id/repositori/index.php/prosiding/article/view/senter2023p13.