Purves, W. K., & Orians, G. H. (1983). Life: The science of biology. W. Grant Press.
Chicago-čujuhus (17. p.)Purves, William Kirkwood, juo Gordon H. Orians. Life: The Science of Biology. Sinauer Associates: W. Grant Press, 1983.
MLA-čujuhus (9. p.)Purves, William Kirkwood, juo Gordon H. Orians. Life: The Science of Biology. W. Grant Press, 1983.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.