APA
Thornes J. B., . (1990). Vegetation and erosion. New York: John Wiley.
Chicago
Thornes J B, . 1990. Vegetation and erosion. New York: John Wiley.
Harvard
Thornes J. B., . (1990). Vegetation and erosion. New York: John Wiley.
MLA
Thornes J B, . Vegetation and erosion. New York: John Wiley. 1990.