1. Influence: the psychology of persuasion Cialdini, Robert B., New York : Harper Business, 2021. GEB202
2. Personal finance: building your future Walker, Robert B. New York : McGraw-Hill Education, c2017. FIN349
3. A history of economic theory and method Ekelund, Robert B. (Robert Burton), 1940- Long Grove, IL : Waveland Press, 2013. ECON303
