Não informado. (1959). Industrial world. Johnston International Publishing Corporation.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrial World. New York: Johnston International Publishing Corporation, 1959.
Lua MLA (8ú heag.)Não informado. Industrial World. Johnston International Publishing Corporation, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.