Penn, R. (2016). The Man Who Made Things Out of Trees. Penguin.
Lua i Stíl Chicago (17ú heag.)Penn, Robert. The Man Who Made Things Out of Trees. Penguin, 2016.
Lua MLA (9ú heag.)Penn, Robert. The Man Who Made Things Out of Trees. Penguin, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.