Botkin, D. B., & Keller, E. A. (2011). Environmental science: Earth as a living planet (8th ed.). John Wiley & Sons, Inc..
Chicago-čujuhus (17. p.)Botkin, Daniel B., juo Edward A. Keller. Environmental Science: Earth as a Living Planet. 8th ed. Hoboken, NJ: John Wiley & Sons, Inc., 2011.
MLA-čujuhus (9. p.)Botkin, Daniel B., juo Edward A. Keller. Environmental Science: Earth as a Living Planet. 8th ed. John Wiley & Sons, Inc., 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.