Cita APA (7a ed.)

Unger, R. M., & Smolin, L. (2015). The singular universe and the reality of time: A proposal in natural philosophy (1st published, 3rd printing.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Unger, Roberto Mangabeira, y Lee Smolin. The Singular Universe and the Reality of Time: A Proposal in Natural Philosophy. 1st published, 3rd printing. Cambridge: Cambridge University Press, 2015.

Cita MLA (9a ed.)

Unger, Roberto Mangabeira, y Lee Smolin. The Singular Universe and the Reality of Time: A Proposal in Natural Philosophy. 1st published, 3rd printing. Cambridge University Press, 2015.