Velzy, R. (1981). The House of Mary Shrine on Lewis and Clark Lake, Yankton, South Dakota. Observer.
Lua i Stíl Chicago (17ú heag.)Velzy, Reta. The House of Mary Shrine on Lewis and Clark Lake, Yankton, South Dakota. [Gayville, S.D.: Observer, 1981.
Lua MLA (8ú heag.)Velzy, Reta. The House of Mary Shrine on Lewis and Clark Lake, Yankton, South Dakota. Observer, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.