1. Arnold, M.(1865). Essay in Criticism. New York: A. L. Burt Company Publishers.
2. Ashley, W. (1892). An Introduction to English Economic History and Theory. Vol, 2. London: Longmans&Co.
3. Bloch, Marc. (1966). French Rural History. J. Sondheimer (trans.). Berkeley: University of California Press.
4. Caesar, C. J. De Bello Gallico 50-58 B.C. T. De Quincey (trans.). Softcover classics.
5. Collected Papers of Paul Vinogradoff. (1928). H. A. L. Fisher (ed.). vol. I. Oxford: Clarendon Press.