Não informado. (1947). Scottish forestry. Royal Scottish Forestry Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Scottish Forestry. Edinburgh, Inglaterra: Royal Scottish Forestry Society, 1947.
Lua MLA (8ú heag.)Não informado. Scottish Forestry. Royal Scottish Forestry Society, 1947.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.