United Nations Economic Commission for Europe. (2008). Non-observed economy in national accounts: Survey of country practices. UN.
Цитирование в стиле Чикаго (17-е изд.)United Nations Economic Commission for Europe. Non-observed Economy in National Accounts: Survey of Country Practices. Geneva: UN, 2008.
Цитирование MLA (8-е изд.)United Nations Economic Commission for Europe. Non-observed Economy in National Accounts: Survey of Country Practices. UN, 2008.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.