Pohl, F. (1976). Gateway. Millennium.
Lua i Stíl Chicago (17ú heag.)Pohl, Frederik. Gateway. London: Millennium, 1976.
Lua MLA (9ú heag.)Pohl, Frederik. Gateway. Millennium, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.