CRAVENS, R. H. (1977). Pests And Diseases Richard H.cravens. Time-Life Books.
Lua i Stíl Chicago (17ú heag.)CRAVENS, Richard H. Pests And Diseases Richard H.cravens. Time-Life Books, 1977.
Lua MLA (8ú heag.)CRAVENS, Richard H. Pests And Diseases Richard H.cravens. Time-Life Books, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.