World Health Organization. Study Group on Primary Health Care in Urban Areas. (1992). The role of health centres in the development of urban health systems: Report of a WHO Study Group on Primary Health Care in Urban Areas. World Health Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Health Organization. Study Group on Primary Health Care in Urban Areas. The Role of Health Centres in the Development of Urban Health Systems: Report of a WHO Study Group on Primary Health Care in Urban Areas. Geneva: World Health Organization, 1992.
Παραπομπή σε μορφή MLA (8th εκδ.)World Health Organization. Study Group on Primary Health Care in Urban Areas. The Role of Health Centres in the Development of Urban Health Systems: Report of a WHO Study Group on Primary Health Care in Urban Areas. World Health Organization, 1992.