APA

O'Hear A., . (2001). Philosophy at the new millennium. Cambridge: University Press.

Chicago

O'Hear A, . 2001. Philosophy at the new millennium. Cambridge: University Press.

Harvard

O'Hear A., . (2001). Philosophy at the new millennium. Cambridge: University Press.

MLA

O'Hear A, . Philosophy at the new millennium. Cambridge: University Press. 2001.