Duane, D. B. (1970). Synoptic observations of sand movement. U.S. Army, Corps of Engineers, Coastal Engineering Research Center.
Lua i Stíl Chicago (17ú heag.)Duane, David B. Synoptic Observations of Sand Movement. Washington: U.S. Army, Corps of Engineers, Coastal Engineering Research Center, 1970.
Lua MLA (8ú heag.)Duane, David B. Synoptic Observations of Sand Movement. U.S. Army, Corps of Engineers, Coastal Engineering Research Center, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.