Harveson. Woody Plants of the Big Bend and Trans-Pecos. Texas A&M University Press.
Lua i Stíl Chicago (17ú heag.)Harveson. Woody Plants of the Big Bend and Trans-Pecos. Texas A&M University Press.
Lua MLA (9ú heag.)Harveson. Woody Plants of the Big Bend and Trans-Pecos. Texas A&M University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.