Richards, G. (1987). Human evolution: An introduction for the behavioural sciences. Routledge & Kegan Paul.
Citazione stile Chigago Style (17a edizione)Richards, Graham. Human Evolution: An Introduction for the Behavioural Sciences. London: Routledge & Kegan Paul, 1987.
Citatione MLA (9a ed.)Richards, Graham. Human Evolution: An Introduction for the Behavioural Sciences. Routledge & Kegan Paul, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.