Reader's Digest Association & Chad, R. W. (2007). When nature turns nasty. Reader's Digest Association.
Lua i Stíl Chicago (17ú heag.)Reader's Digest Association agus Rachel Warren Chad. When Nature Turns Nasty. London: Reader's Digest Association, 2007.
Lua MLA (8ú heag.)Reader's Digest Association agus Rachel Warren Chad. When Nature Turns Nasty. Reader's Digest Association, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.