APA (7th ed.) Citation

O'Brien, D. P. (1970). J. R. McCulloch: A study in classical economics. Allen Unwin.

Chicago Style (17th ed.) Citation

O'Brien, Denis P. J. R. McCulloch: A Study in Classical Economics. London: Allen Unwin, 1970.

MLA (9th ed.) Citation

O'Brien, Denis P. J. R. McCulloch: A Study in Classical Economics. Allen Unwin, 1970.