Wijayanti, A. W., Syarifah, and T. Wahyuono. “Request for Blood Components Packed Red Cell at UDD PMI Sukoharjo in Quarter I of 2021”. International Journal of Seocology, vol. 4, no. 02, Feb. 2023, pp. 064-8, https://seocologi.com/index.php/seocology/article/view/91.