Ridley, M. (1996). Evolution (Second edition.). Blackwell Science.
Chicago-čujuhus (17. p.)Ridley, Mark. Evolution. Second edition. Cambridge: Blackwell Science, 1996.
MLA-čujuhus (9. p.)Ridley, Mark. Evolution. Second edition. Blackwell Science, 1996.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.