Dyfyniad APA
Wisner, B., Blaikie, P., Cannon, T., & Davis, I. (2004). At Risk: Natural Hazards, People's Vulnerability and Disasters (2nd ed.). Routledge.
Dyfyniad Arddull Chicago
Wisner, Ben, Piers Blaikie, Terry Cannon, and Ian Davis. At Risk: Natural Hazards, People's Vulnerability and Disasters. 2nd ed. New York: Routledge, 2004.
Dyfyniad MLA
Wisner, Ben, et al. At Risk: Natural Hazards, People's Vulnerability and Disasters. 2nd ed. Routledge, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.