Welsh, W. (1973). Studying politics. Praeger publ.
Lua i Stíl Chicago (17ú heag.)Welsh, William. Studying Politics. New York: Praeger publ, 1973.
Lua MLA (9ú heag.)Welsh, William. Studying Politics. Praeger publ, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.