S., W. P. (1906). The ennobling of labour.
Lua i Stíl Chicago (17ú heag.)S., W. P. The Ennobling of Labour. 1906.
Lua MLA (9ú heag.)S., W. P. The Ennobling of Labour. 1906.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.