(1996). Plants volume 4/ed. Tony Whitten, Jane Whitten. Grolier International.
Lua i Stíl Chicago (17ú heag.)Plants Volume 4/ed. Tony Whitten, Jane Whitten. Grolier International, 1996.
Lua MLA (8ú heag.)Plants Volume 4/ed. Tony Whitten, Jane Whitten. Grolier International, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.