APA (7e ed.) Bronvermelding

Keller, E. A., & Blodgett, R. H. (2008). Natural hazards: Earth's processes as hazards, disasters, and catastrophes (2nd ed.). Pearson/Prentice Hall.

Chicago (17e ed.) Bronvermelding

Keller, Edward A., en Robert H. Blodgett. Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes. 2nd ed. Upper Saddle River, NJ: Pearson/Prentice Hall, 2008.

MLA (9e ed.) Bronvermelding

Keller, Edward A., en Robert H. Blodgett. Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes. 2nd ed. Pearson/Prentice Hall, 2008.