Dyfyniad APA
Santayana, G., Wokeck, M. S., & Coleman, M. A. (2013). The life of reason, or, The phases of human progress (Critical ed.). MIT Press.
Dyfyniad Arddull Chicago
Santayana, George, Marianne Sophia Wokeck, and Martin A. Coleman. The Life of Reason, or, The Phases of Human Progress. Critical ed. Cambridge, Mass.: MIT Press, 2013.
Dyfyniad MLA
Santayana, George, et al. The Life of Reason, or, The Phases of Human Progress. Critical ed. MIT Press, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.