1. Van Lerberghe W. The World Health Report 2008: Primary Health Care: Now More than Ever. World Health Organization; 2008.
2. A patient-centered understanding of the referral system in Ethiopian primary health care units;Abrahim;PLoS One,2015
3. A blank page: Feedback from first referral hospitals to primary health care clinics;Legodi;South African Family Practice,2015
4. WHO. Management of health facilities: Referral systems. World Health Organization. 2014.
5. Challenges facing implementation of referral system for quality health care services in Kiambu county, Kenya;Kamau;Health Syst Policy Res,2017