Putri, A., Destria Kurnianti, and Susan Febriantina. “Analysis Implementation Standard Operational Procedur In Field Of Correspondance Pt Elang Mas Asia”. International Student Conference on Business, Education, Economics, Accounting, and Management (ISC-BEAM), Vol. 2, no. 1, Sept. 2024, pp. 865 -72, doi:10.21009/ISC-BEAM.012.54.