Sorkin, A. L. (1982). Economic aspects of natural hazards. Lexington Books.
Lua i Stíl Chicago (17ú heag.)Sorkin, Alan L. Economic Aspects of Natural Hazards. Lexington: Lexington Books, 1982.
Lua MLA (9ú heag.)Sorkin, Alan L. Economic Aspects of Natural Hazards. Lexington Books, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.