WHO Study Group on Primary Health Care in Urban Areas & World Health Organization. (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.
Lua i Stíl Chicago (17ú heag.)WHO Study Group on Primary Health Care in Urban Areas agus World Health Organization. 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, Switzerland: World Health Organization, 1992.
Lua MLA (9ú heag.)WHO Study Group on Primary Health Care in Urban Areas agus World Health Organization. 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.