Abraham, W. I. Problems of national income measurement in underdeveloped countries with special reference to the Philippines. University Microfilms.
Čikaški stil citiranja (17. izdanje)Abraham, William Israel. Problems of National Income Measurement in Underdeveloped Countries with Special Reference to the Philippines. Ann Arbor, Mich: University Microfilms.
MLA način citiranja (9. izdanje)Abraham, William Israel. Problems of National Income Measurement in Underdeveloped Countries with Special Reference to the Philippines. University Microfilms.
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