What are the sources for the data of children who finished primary school education in Latin America & Caribbean countries?
Latin America & Caribbean is the name of the region; children who finished primary school education refer to IndicatorName = 'Out-of-school children of primary school age, both sexes (number)'; sources refer to Description;
SELECT DISTINCT T2.Source FROM Footnotes AS T1 INNER JOIN Series AS T2 ON T1.Seriescode = T2.SeriesCode INNER JOIN Country AS T3 ON T1.Countrycode = T3.CountryCode WHERE T3.Region = 'Latin America & Caribbean' AND T2.IndicatorName = 'Children out of school, primary'