Wallace, I. (1990). The global economic system. Unwin Hyman.
Cita Chicago (17th ed.)Wallace, Iain. The Global Economic System. London: Unwin Hyman, 1990.
Cita MLA (9th ed.)Wallace, Iain. The Global Economic System. Unwin Hyman, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.