Não informado. (1960). Main Economic Indicators. Department of Economics and Statistics.
Chicago-viite (17. p.)Não informado. Main Economic Indicators. Paris: Department of Economics and Statistics, 1960.
MLA-viite (8. p.)Não informado. Main Economic Indicators. Department of Economics and Statistics, 1960.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.