Bernal, Richard. "Globalization and Small Open Economies: The Imperative for Repositioning." Globalization: A Calculus of Inequity. Perspectives from the South, edited by Denis Benn and Kenneth Hall, Randle, 2000.
Buchanan, James M. "Opportunity Cost." The New Palgrave Dictionary of Economics, 2nd ed., edited by Steven N. Durlauf and Lawrence E. Blume, Palgrave Macmillan, 2008.
Free, Rhona C., editor. 21st Century Economics: A Reference Handbook. SAGE, 2010.