Berry, D., & Cutts, R. (1986). Plants. Time-Life Books.
Lua i Stíl Chicago (17ú heag.)Berry, Dick, agus Robert Cutts. Plants. Hong Kong: Time-Life Books, 1986.
Lua MLA (9ú heag.)Berry, Dick, agus Robert Cutts. Plants. Time-Life Books, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.