Barnes, R., Filer, D., & Milton, S. (1996). Acacia karroo: Monograph and annotated bibliography. Oxford Forestry Institute, University of Oxford.
Lua i Stíl Chicago (17ú heag.)Barnes, R., D. Filer, agus S. Milton. Acacia Karroo: Monograph and Annotated Bibliography. Oxford Forestry Institute, University of Oxford, 1996.
Lua MLA (9ú heag.)Barnes, R., et al. Acacia Karroo: Monograph and Annotated Bibliography. Oxford Forestry Institute, University of Oxford, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.