1. L. Robbins, An Essay on the Nature and Significance of Economic Science (Macmillan, 1935 )
2. K. E. Boulding, The Skills of the Economist (Hamish Hamilton, 1958 )
3. J. M. Keynes, The General Theory of Employment, Interest and Money (Macmillan, 1936)
4. D. C. Hague, Managerial Economics: Analysis for Business Decisions (Longman, 1969 )
5. Kenneth E. Boulding, The Skills of the Economist (Hamish Hamilton, 1958 )