Ashton, J. (1967). Economic change and agriculture. Oliver & Boyd.
Cita Chicago (17th ed.)Ashton, J. Economic Change and Agriculture. Edenburgh: Oliver & Boyd, 1967.
Cita MLA (9th ed.)Ashton, J. Economic Change and Agriculture. Oliver & Boyd, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.