APA (7e ed.) Bronvermelding

Keller, E. A., DeVecchio, D. E., & Blodgett, R. H. Natural hazards: Earth's processes as hazards, disasters, and catastrophes (3rd ed.).

Chicago (17e ed.) Bronvermelding

Keller, Edward A., Duane E. DeVecchio, en Robert H. Blodgett. Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes. 3rd ed.

MLA (8e ed.) Bronvermelding

Keller, Edward A., et al. Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes. 3rd ed.