Bank al-Markazī al-Yamanī. Research Dept. Foreign trade statistics of Yemen Arab Republic. Central Bank of Yemen. Research Dept.
Παραπομπή σε μορφή Chicago (17η εκδ.)Bank al-Markazī al-Yamanī. Research Dept. Foreign Trade Statistics of Yemen Arab Republic. Sana'a: Central Bank of Yemen. Research Dept.
Παραπομπή σε μορφή MLA (8th εκδ.)Bank al-Markazī al-Yamanī. Research Dept. Foreign Trade Statistics of Yemen Arab Republic. Central Bank of Yemen. Research Dept.
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