Não informado. (2022). USDA Forest Service Resource Bulletin NE. Northeastern Forest Experiment Station.
Lua i Stíl Chicago (17ú heag.)Não informado. USDA Forest Service Resource Bulletin NE. Upper Darby, Pa: Northeastern Forest Experiment Station, 2022.
Lua MLA (8ú heag.)Não informado. USDA Forest Service Resource Bulletin NE. Northeastern Forest Experiment Station, 2022.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.