Lang, G. M., & Hopkins, W. G. (2007). Horticulture. Chelsea House.
Lua i Stíl Chicago (17ú heag.)Lang, Gail M., agus William G. Hopkins. Horticulture. New York: Chelsea House, 2007.
Lua MLA (8ú heag.)Lang, Gail M., agus William G. Hopkins. Horticulture. Chelsea House, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.