Não informado. (1926). Iowa State College journal of science. Iowa State College Press.
Chicago-referens (17:e uppl.)Não informado. Iowa State College Journal of Science. Ames, Iowa: Iowa State College Press, 1926.
MLA-referens (8:e uppl.)Não informado. Iowa State College Journal of Science. Iowa State College Press, 1926.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.