Widiastoeti, Hendy, and Maulidah Narastri. 2021. “Improvement of Internal Control Through Operational Standards for Procedures for Procurement of The Equipment and Services at ’D’ Type Hospital in Sumenep District”. Enrichment : Journal of Management 11 (2), 373-77. https://doi.org/10.35335/enrichment.v11i2.108.