Provenance des données
Sources officielles
Le bureau central des statistiques de Lettonie effectue des enquêtes et des recensements périodiques [Results of the 2000 population and housing census in Latvia - collection of statistical (...)
Enquêtes
– Ringolds BALODIS (Ed.), State and Church in the Baltic States, 2001, Latvian Association for Freedom of Religion, 2001.
– US State department annual International Religious Freedom Report 2014.