Cita APA (7th ed.)

Montgomery, D. R. (2007). Dirt: The erosion of civilizations. University of California Press.

Cita Chicago (17th ed.)

Montgomery, David R. Dirt: The Erosion of Civilizations. Berkeley: University of California Press, 2007.

Cita MLA (8th ed.)

Montgomery, David R. Dirt: The Erosion of Civilizations. University of California Press, 2007.