Copping, L. G. (1996). Crop protection agents from nature. The Royal Society of Chemistry.
Lua i Stíl Chicago (17ú heag.)Copping, Leonard G. Crop Protection Agents from Nature. Cambridge: The Royal Society of Chemistry, 1996.
Lua MLA (9ú heag.)Copping, Leonard G. Crop Protection Agents from Nature. The Royal Society of Chemistry, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.