Elliott, J. E., & Campbell, R. W. (1973). Comparative economic systems. Prentice-Hall.
Cita Chicago (17th ed.)Elliott, John E., i Robert Wellington Campbell. Comparative Economic Systems. Englewood Cliffs, N.J: Prentice-Hall, 1973.
Cita MLA (9th ed.)Elliott, John E., i Robert Wellington Campbell. Comparative Economic Systems. Prentice-Hall, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.