DANIELSON, E. W. (1986). Earth Scince Eric W. Danielson And Edward J. Denecke. Macmillan.
Lua i Stíl Chicago (17ú heag.)DANIELSON, Eric W. Earth Scince Eric W. Danielson And Edward J. Denecke. Macmillan, 1986.
Lua MLA (8ú heag.)DANIELSON, Eric W. Earth Scince Eric W. Danielson And Edward J. Denecke. Macmillan, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.