Kingsbury, D. (2002). Psychohistorical crisis (First mass market edition.). Tom Doherty Associates Book.
Lua i Stíl Chicago (17ú heag.)Kingsbury, Donald. Psychohistorical Crisis. First mass market edition. New York: Tom Doherty Associates Book, 2002.
Lua MLA (9ú heag.)Kingsbury, Donald. Psychohistorical Crisis. First mass market edition. Tom Doherty Associates Book, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.