Blewett. Geology and Landscape of Michigan’s Pictured Rocks National Lakeshore and Vicinity. Wayne State University Press.
Lua i Stíl Chicago (17ú heag.)Blewett. Geology and Landscape of Michigan’s Pictured Rocks National Lakeshore and Vicinity. Wayne State University Press.
Lua MLA (9ú heag.)Blewett. Geology and Landscape of Michigan’s Pictured Rocks National Lakeshore and Vicinity. Wayne State University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.