Cita APA (7th ed.)

Harpp, K. S. (2014). The Galápagos: A natural laboratory for the Earth sciences. American Geophysical Union : John Wiley & Sons, Inc..

Cita Chicago (17th ed.)

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.

Cita MLA (9th ed.)

Harpp, Karen S. The Galápagos: A Natural Laboratory for the Earth Sciences. American Geophysical Union : John Wiley & Sons, Inc., 2014.