National geographic society, Washington, D. C. (1923). The capital of our country. National geographic society.
Lua i Stíl Chicago (17ú heag.)National geographic society, Washington, D. C. The Capital of Our Country. Washington, D.C: National geographic society, 1923.
Lua MLA (9ú heag.)National geographic society, Washington, D. C. The Capital of Our Country. National geographic society, 1923.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.