Virginia Polytechnic Institute and State University & Virginia Agricultural Experiment Station. (1981). Bulletin. Virginia Polytechnic Institute and State University.
Chicago-referens (17:e uppl.)Virginia Polytechnic Institute and State University och Virginia Agricultural Experiment Station. Bulletin. Blacksburg: Virginia Polytechnic Institute and State University, 1981.
MLA-referens (8:e uppl.)Virginia Polytechnic Institute and State University och Virginia Agricultural Experiment Station. Bulletin. Virginia Polytechnic Institute and State University, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.