Eastham, J. (1960). Graphical economics. Eng. Univ. Press.
Cita Chicago (17th ed.)Eastham, J. Graphical Economics. London: Eng. Univ. Press, 1960.
Cita MLA (9th ed.)Eastham, J. Graphical Economics. Eng. Univ. Press, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.