Wallace, I. (1990). The global economic system. Unwin Hyman.
Chicago Style (17th ed.) ZitazioaWallace, Iain. The Global Economic System. London: Unwin Hyman, 1990.
MLA (9th ed.) ZitazioaWallace, Iain. The Global Economic System. Unwin Hyman, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.