Fatma Suci Ramadhani, et al. “Analysis of the Incoming and Outgoing Letter System in the Protocol Division at the Ministry of Agriculture”. International Student Conference on Business, Education, Economics, Accounting, and Management (ISC-BEAM), vol. 2, no. 1, Aug. 2024, https://journal.unj.ac.id/unj/index.php/isc-beam/article/view/47182.