Birks, J. S. (1978). Human capital on the Nile: Development and emigration in the Arab Republic of Egypt and the Democratic Republic of Sudan. International Labour Office.
Chicago-viite (17. p.)Birks, J. S. Human Capital on the Nile: Development and Emigration in the Arab Republic of Egypt and the Democratic Republic of Sudan. Geneva [Switzerland]: International Labour Office, 1978.
MLA-viite (9. p.)Birks, J. S. Human Capital on the Nile: Development and Emigration in the Arab Republic of Egypt and the Democratic Republic of Sudan. International Labour Office, 1978.
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