Graham, E. H., & Van Dersal, W. R. (1949). Wildlife for America: The story of wildlife conservation. Oxford Univ. Press.
Lua i Stíl Chicago (17ú heag.)Graham, Edward H., agus William Richard Van Dersal. Wildlife for America: The Story of Wildlife Conservation. New York: Oxford Univ. Press, 1949.
Lua MLA (8ú heag.)Graham, Edward H., agus William Richard Van Dersal. Wildlife for America: The Story of Wildlife Conservation. Oxford Univ. Press, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.