Não informado. (1923). Minnesota Studies in Plant Science. University of Minnesota.
Chicago-Zitierstil (17. Ausg.)Não informado. Minnesota Studies in Plant Science. Minneapolis, Minn: University of Minnesota, 1923.
MLA-Zitierstil (8. Ausg.)Não informado. Minnesota Studies in Plant Science. University of Minnesota, 1923.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.