Wanja, Tenambergen, Kezia Njoroge, and Epony N. Osoro. “Factors Influencing Upward Referral System of Patients in Nairobi County”. International Journal Of Community Medicine And Public Health 8, no. 10 (September 27, 2021): 4759–4766. Accessed May 23, 2026. https://www.ijcmph.com/index.php/ijcmph/article/view/8668.