Lewis, R. a. (2007). Life (6th ed.). McGraw-Hill.
Chicago-čujuhus (17. p.)Lewis, Ricki...[et al]. Life. 6th ed. Boston, MA: McGraw-Hill, 2007.
MLA-čujuhus (9. p.)Lewis, Ricki...[et al]. Life. 6th ed. McGraw-Hill, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.