Citazione Stile APA (7a Edizione)

Darwin, C., Barrett, P. H., & Gruber, H. E. (1980). Metaphysics, materialism, and the evolution of mind: Early writings of Charles Darwin. The University of Chicago Press.

Citazione stile Chigago Style (17a edizione)

Darwin, Charles, Paul H. Barrett, e Howard Ernest Gruber. Metaphysics, Materialism, and the Evolution of Mind: Early Writings of Charles Darwin. Chicago: The University of Chicago Press, 1980.

Citatione MLA (9a ed.)

Darwin, Charles, et al. Metaphysics, Materialism, and the Evolution of Mind: Early Writings of Charles Darwin. The University of Chicago Press, 1980.