Clifford, J. (1978). Aspects of economic development 1760 to 1960. Longman Publication.
Cita Chicago (17th ed.)Clifford, James. Aspects of Economic Development 1760 to 1960. London: Longman Publication, 1978.
Cita MLA (9th ed.)Clifford, James. Aspects of Economic Development 1760 to 1960. Longman Publication, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.