Não informado. (1938). Frontier. Illinois Institute of Technology.
Lua i Stíl Chicago (17ú heag.)Não informado. Frontier. Chicago, Ill: Illinois Institute of Technology, 1938.
Lua MLA (8ú heag.)Não informado. Frontier. Illinois Institute of Technology, 1938.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.