Não informado. (1973). Cornell International agriculture bulletin. New York State College of Agriculture and Life Sciences.
Chicago-referens (17:e uppl.)Não informado. Cornell International Agriculture Bulletin. Ithaca, NY: New York State College of Agriculture and Life Sciences, 1973.
MLA-referens (8:e uppl.)Não informado. Cornell International Agriculture Bulletin. New York State College of Agriculture and Life Sciences, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.