Praeger, R. L. (1919). Nathaniel Colgan. With portrait and bibliography.
Lua i Stíl Chicago (17ú heag.)Praeger, R. Lloyd. Nathaniel Colgan. With Portrait and Bibliography. 1919.
Lua MLA (9ú heag.)Praeger, R. Lloyd. Nathaniel Colgan. With Portrait and Bibliography. 1919.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
