Não informado. Handbook of International Trade Development Statistics. United Nations Conference on Trade and Development.
Lua i Stíl Chicago (17ú heag.)Não informado. Handbook of International Trade Development Statistics. Geneva, Suíça: United Nations Conference on Trade and Development.
Lua MLA (8ú heag.)Não informado. Handbook of International Trade Development Statistics. United Nations Conference on Trade and Development.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.