Não informado. (1948). Frontiers of Plant Science. Connecticut Agricultural Experiment Station.
Chicago-referens (17:e uppl.)Não informado. Frontiers of Plant Science. New Haven, Conn: Connecticut Agricultural Experiment Station, 1948.
MLA-referens (8:e uppl.)Não informado. Frontiers of Plant Science. Connecticut Agricultural Experiment Station, 1948.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.