R. . br. Saragih, F. Simanjuntak, T. I. . Purba, and E. N. . Hutasoit, “A Descriptive Study on the Role of the Post Office in Mail Services in the Digitalization Era: The Post Office at Jl. Pelita IV, Medan Perjuangan”, BIP, vol. 7, no. 1, pp. 95-98, Mar. 2025.