Richards, R. J. Darwin on mind, morals and emotions: Robert J. Richards. The Cambridge Companion to Darwin.(2006).
Citazione stile Chigago Style (17a edizione)Richards, Robert J. "Darwin on Mind, Morals and Emotions: Robert J. Richards." The Cambridge Companion to Darwin.(2006) .
Citatione MLA (8a ed.)Richards, Robert J. "Darwin on Mind, Morals and Emotions: Robert J. Richards." The Cambridge Companion to Darwin.(2006), .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.