Hart, W. (1972). Study guide for agricultural pest control advisers on nematodes and nematicides. University of California.
Lua i Stíl Chicago (17ú heag.)Hart, Winfield. Study Guide for Agricultural Pest Control Advisers on Nematodes and Nematicides. Berkeley: University of California, 1972.
Lua MLA (9ú heag.)Hart, Winfield. Study Guide for Agricultural Pest Control Advisers on Nematodes and Nematicides. University of California, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.