Hughes, R. O. (1948). Civic training. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Hughes, R. O. Civic Training. Boston : New York [etc.]: Allyn and Bacon, 1948.
Lua MLA (8ú heag.)Hughes, R. O. Civic Training. Allyn and Bacon, 1948.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.