I-ISO 3166 wuhlelo olubizwa nge-Standardization olushicilelwa yi-International Organization for Standardization (ngamafuphi okuyi-ISO). Loluhlelo lusebenzisa amakhodi ukuchaza izifunda, izifundazwe kanye namazwe. "Country Codes - ISO 3166". International Organization for Standardization (ISO). Kulandwe ngo-Zibandlela 24, 2020. Le-athikhili iyisigcino (isiNgisi: "a stub"). Ungakwazi ukusiza uWikipedia: ngokuyikhulisa.