Gaya APA

Keller, E, A., DeVecchio, D, E. (2014). E-book Natural Hazards: Earth's Processes As Hazards, Disasters, and Catastrophes . : Benjamin Cummings.

Gaya MLA

Keller, Edward, A.., DeVecchio, Duane, E.. "E-book Natural Hazards: Earth's Processes As Hazards, Disasters, and Catastrophes". : Benjamin Cummings, 2014. Text.