1. Abbot, Lawrence (1955). Quality and Competition. Columbia University Press, New York.
2. Boulding, K. E. (1950). A Reconstruction of Economics. John Wiley & Sons, Inc., New York.
3. Chamberlin, E. H., editor (1950a). Monopoly and Competition and Their Regulation. John Wiley & Sons, Inc., New York. From the International Economic Association.
4. Chamberlin, E. H. (1950b). The Theory of Monopolistic Competition. Harvard University Press, Cambridge, Massachusetts, sixth edition.
5. Clark, J. M. (1923). Studies in the Economics of Overhead Costs. University of Chicago Press, Chicago.