Lua APA (7ú heag.)

Não informado. (2018). Research Circular. Pennsylvania Department of Forests and Waters.

Lua i Stíl Chicago (17ú heag.)

Não informado. Research Circular. Harrisburg, Pa: Pennsylvania Department of Forests and Waters, 2018.

Lua MLA (8ú heag.)

Não informado. Research Circular. Pennsylvania Department of Forests and Waters, 2018.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.