O'Brien, D. P. 1. (1975). The classical economists. Oxford: Clarendon Press.
Chicago Style CitationO'Brien, D. P. 1939-. The Classical Economists. Oxford: Clarendon Press, 1975.
MLA CitationO'Brien, D. P. 1939-. The Classical Economists. Oxford: Clarendon Press, 1975.
Warning: These citations may not always be 100% accurate.