Não informado. (1888). Bulletin from the Laboratories of Natural History of the State University of Iowa. University of Iowa.
Chicago-Zitierstil (17. Ausg.)Não informado. Bulletin from the Laboratories of Natural History of the State University of Iowa. Iowa City, Iowa: University of Iowa, 1888.
MLA-Zitierstil (8. Ausg.)Não informado. Bulletin from the Laboratories of Natural History of the State University of Iowa. University of Iowa, 1888.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.