APA (7th ed.) Citation

O'Brien, D. P. (1975). The classical economists. Clarendon Pr.

Chicago Style (17th ed.) Citation

O'Brien, Dennis P. The Classical Economists. Oxford: Clarendon Pr, 1975.

MLA (9th ed.) Citation

O'Brien, Dennis P. The Classical Economists. Clarendon Pr, 1975.

Warning: These citations may not always be 100% accurate.