Ananda, Rifki Ade, Moses Adeolu Agoi, and Muhammad Yasin Simargolang. “Optimization of Official Correspondence Management With Google Sheets”. Bigint Computing Journal 3, no. 2 (July 3, 2025): 59–66. Accessed August 24, 2025. https://journal.aira.or.id/index.php/bigint/article/view/1137.