Não informado. Handbook of International Trade Development Statistics. United Nations Conference on Trade and Development.
Citação do estilo Chicago (17ª ed.)Não informado. Handbook of International Trade Development Statistics. Geneva, Suíça: United Nations Conference on Trade and Development.
Citação MLA (8ª ed.)Não informado. Handbook of International Trade Development Statistics. United Nations Conference on Trade and Development.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.