Não informado. (1971). Man and Nature. Massachusetts Audubon Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Man and Nature. Lincoln, Mass: Massachusetts Audubon Society, 1971.
Lua MLA (8ú heag.)Não informado. Man and Nature. Massachusetts Audubon Society, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.