Marris, R. (1958). Economic arithmetic. Macmillan.
Cita Chicago (17th ed.)Marris, Robin. Economic Arithmetic. London: Macmillan, 1958.
Cita MLA (9th ed.)Marris, Robin. Economic Arithmetic. Macmillan, 1958.
Atenció: Aquestes cites poden no estar 100% correctes.