Gaya APA

Costa, J, E., Wieczorek, G, F. (1987). Debris Flows / Avalanches : Process, Recognition, and Mitigation . United States of America: The Geological Society.

Gaya MLA

Costa, John, E., Wieczorek, Gerald, F. "Debris Flows / Avalanches : Process, Recognition, and Mitigation". United States of America: The Geological Society, 1987. Text.