Maynard Smith, J. (1986). The problems of biology. Oxford University Press.
Chicago-čujuhus (17. p.)Maynard Smith, John. The Problems of Biology. Oxford: Oxford University Press, 1986.
MLA-čujuhus (9. p.)Maynard Smith, John. The Problems of Biology. Oxford University Press, 1986.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.