Rippelmeyer. Giant City State Park and the Civilian Conservation Corps. Southern Illinois University Press.
Lua i Stíl Chicago (17ú heag.)Rippelmeyer. Giant City State Park and the Civilian Conservation Corps. Southern Illinois University Press.
Lua MLA (9ú heag.)Rippelmeyer. Giant City State Park and the Civilian Conservation Corps. Southern Illinois University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.