Weeks, M. (2014). Heads up philosophy (First American edition.). DK Publishing.
Cita Chicago Style (17a ed.)Weeks, Martin. Heads Up Philosophy. First American edition. New York, N.Y.: DK Publishing, 2014.
Cita MLA (8a ed.)Weeks, Martin. Heads Up Philosophy. First American edition. DK Publishing, 2014.
Precaución: Estas citas no son 100% exactas.