^Daniel J. Cantor, Juliet B. Schor, Tunnel Vision: Labor, the World Economy, and Central America, South End Press, 1987, p. 21: "By economic system or economic order, we mean the principles, laws, institutions, and understandings business is conducted."
^Gregory and Stuart, Paul and Robert (February 28, 2013). The Global Economy and its Economic Systems. South-Western College Pub. pp. 30. ISBN978-1285055350. "Economic system – A set of institutions for decision making and for the implementation of decisions concerning production, income, and consumption within a given geographic area."
^Samuelson, P. Anthony., Samuelson, W. (1980). Economics. 11th ed. / New York: McGraw-Hill. p. 34