Bloom, A. L. (1969). The surface of the earth. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Bloom, Arthur L. The Surface of the Earth. New Jersey: Prentice-Hall, 1969.
Lua MLA (9ú heag.)Bloom, Arthur L. The Surface of the Earth. Prentice-Hall, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.