Herbst Judith. (2005). Unexplained Aliens. Lerner.
Lua i Stíl Chicago (17ú heag.)Herbst Judith. Unexplained Aliens. Lerner, 2005.
Lua MLA (9ú heag.)Herbst Judith. Unexplained Aliens. Lerner, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.