Cita APA (7a ed.)

O'Brien, D. (1969). Empedocles' cosmic cycle: A reconstruction from the fragments and secondary sources. University Press.

Cita Chicago Style (17a ed.)

O'Brien, Denis. Empedocles' Cosmic Cycle: A Reconstruction from the Fragments and Secondary Sources. Cambridge: University Press, 1969.

Cita MLA (9a ed.)

O'Brien, Denis. Empedocles' Cosmic Cycle: A Reconstruction from the Fragments and Secondary Sources. University Press, 1969.