- L-, Gumulya D, Sembel JS, Ginting ML. Analisis Peramalan dan Pengelompokan Jumlah Turis ke Jepang. JIS [Internet]. 2021Dec.30 [cited 2024Apr.28];4(2):150-67. Available from: https://journal.maranatha.edu/index.php/jis/article/view/3164