Ritchie, D. (1981). The ring of fire. New American Library.
Lua i Stíl Chicago (17ú heag.)Ritchie, David. The Ring of Fire. New York: New American Library, 1981.
Lua MLA (9ú heag.)Ritchie, David. The Ring of Fire. New American Library, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.