Virginia Polytechnic Institute and State University & Virginia Agricultural Experiment Station. (1981). Bulletin. Virginia Polytechnic Institute and State University.
Lua i Stíl Chicago (17ú heag.)Virginia Polytechnic Institute and State University agus Virginia Agricultural Experiment Station. Bulletin. Blacksburg: Virginia Polytechnic Institute and State University, 1981.
Lua MLA (8ú heag.)Virginia Polytechnic Institute and State University agus Virginia Agricultural Experiment Station. Bulletin. Virginia Polytechnic Institute and State University, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.