Lua APA (7ú heag.)
Butler, R. W. (1997). The great blue heron: A natural history and ecology of a seashore sentinel. UBC Press.
Lua i Stíl Chicago (17ú heag.)
Butler, Robert William. The Great Blue Heron: A Natural History and Ecology of a Seashore Sentinel. Vancouver, BC: UBC Press, 1997.
Lua MLA (9ú heag.)
Butler, Robert William. The Great Blue Heron: A Natural History and Ecology of a Seashore Sentinel. UBC Press, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.