Michael Roberts. (2014). Biology for Life Second Edition (2nd.). Oxford University Press.
Chicago-čujuhus (17. p.)Michael Roberts. Biology for Life Second Edition. 2nd. Oxford University Press, 2014.
MLA-čujuhus (9. p.)Michael Roberts. Biology for Life Second Edition. 2nd. Oxford University Press, 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.