1. A history of economic theory and method Ekelund, Robert B. (Robert Burton), 1940- Long Grove, IL : Waveland Press, 2013. ECON303
4. Lessons for the young economist Murphy, Robert P. Auburn, AL : Ludwig von Mises Institute, 2010. ECON101
6. Issues in economics today Guell, Robert C., New York, NY : McGraw Hill LLC, [2024] ECON103 ECON104
10. Principles of economics Frank, Robert H., Singapore : McGraw-Hill Education (Asia), c2015. ECON101