Davis, C. (1988). Valley of the Shadow. St. Martin's press.
Lua i Stíl Chicago (17ú heag.)Davis, Christopher. Valley of the Shadow. New York: St. Martin's press, 1988.
Lua MLA (8ú heag.)Davis, Christopher. Valley of the Shadow. St. Martin's press, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.