Crowell-Collier. Editores. Collier's Encyclopedia. Vol I.
Lua i Stíl Chicago (17ú heag.)Crowell-Collier. Editores. Collier's Encyclopedia. Vol I. [s.l.] : Crowell-Collier.
Lua MLA (8ú heag.)Crowell-Collier. Editores. Collier's Encyclopedia. Vol I.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.