Dyfyniad APA
Bell, F. G. (1999). Geological hazards: Their assessment, avoidance, and mitigation. E & FN Spon.
Dyfyniad Arddull Chicago
Bell, F. G. Geological Hazards: Their Assessment, Avoidance, and Mitigation. London, ; New York: E & FN Spon, 1999.
Dyfyniad MLA
Bell, F. G. Geological Hazards: Their Assessment, Avoidance, and Mitigation. E & FN Spon, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.