Cita APA (7a ed.)
Montgomery, D. R. Dirt: The Erosion of Civilizations. University of California.
Cita estilo Chicago (17a ed.)
Montgomery, David R. Dirt: The Erosion of Civilizations. Berkeley, EUA: University of California.
Cita MLA (9a ed.)
Montgomery, David R. Dirt: The Erosion of Civilizations. University of California.
Precaución: Estas citas no son 100% exactas.