Howard, J. (2001). Darwin: A Very Short Introduction (1st.). Oxford.
Chicago-čujuhus (17. p.)Howard, Jonathan. Darwin: A Very Short Introduction. 1st. Oxford, 2001.
MLA-čujuhus (9. p.)Howard, Jonathan. Darwin: A Very Short Introduction. 1st. Oxford, 2001.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.