Harpp, K. S. (2014). The Galápagos: A natural laboratory for the Earth sciences. American Geophysical Union : John Wiley & Sons, Inc..
Chicago-čujuhus (17. p.)Harpp, Karen S. The Galápagos: A Natural Laboratory for the Earth Sciences. Washington, District of Columbia ; Hoboken, New Jersey: American Geophysical Union : John Wiley & Sons, Inc., 2014.
MLA-čujuhus (9. p.)Harpp, Karen S. The Galápagos: A Natural Laboratory for the Earth Sciences. American Geophysical Union : John Wiley & Sons, Inc., 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.