Write SQL query to solve given problem: What are the sources for the data of children who finished primary school education in Latin America & Caribbean countries?. Keep the solution inside sql tag ```sql [SQL-Query] ```
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'