Ordish, G. (1976). The constant pest: A short history of pests and their control. Scribner.
Lua i Stíl Chicago (17ú heag.)Ordish, George. The Constant Pest: A Short History of Pests and Their Control. New York: Scribner, 1976.
Lua MLA (8ú heag.)Ordish, George. The Constant Pest: A Short History of Pests and Their Control. Scribner, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.