Clifford, J. (1978). Aspects of economic development 1760 to 1960. Longman Publication.
Chicago-viite (17. p.)Clifford, James. Aspects of Economic Development 1760 to 1960. London: Longman Publication, 1978.
MLA-viite (9. p.)Clifford, James. Aspects of Economic Development 1760 to 1960. Longman Publication, 1978.
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