United Nations. Department for Economic and Social Information and Policy Analysis. Statistical Division. Industrial Commodity Statistics Yearbook-Annuaire de Stistiques Industrielles. United Nations.
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations. Department for Economic and Social Information and Policy Analysis. Statistical Division. Industrial Commodity Statistics Yearbook-Annuaire De Stistiques Industrielles. New York: United Nations.
Παραπομπή σε μορφή MLA (9th εκδ.)United Nations. Department for Economic and Social Information and Policy Analysis. Statistical Division. Industrial Commodity Statistics Yearbook-Annuaire De Stistiques Industrielles. United Nations.
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