Ross, S. (1987). Hazard geography. Longman.
Lua i Stíl Chicago (17ú heag.)Ross, Simon. Hazard Geography. UK: Longman, 1987.
Lua MLA (9ú heag.)Ross, Simon. Hazard Geography. Longman, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.