Barr, S. (1952). Citizens of the world. Doubleday.
Lua i Stíl Chicago (17ú heag.)Barr, Stringfellow. Citizens of the World. Garden City, N. Y: Doubleday, 1952.
Lua MLA (9ú heag.)Barr, Stringfellow. Citizens of the World. Doubleday, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.