APA-referens (7:e uppl.)

Eilers, L. J., & Roosa, D. M. (1994). The vascular plants of Iowa: An annotated checklist and natural history. University of Iowa Press.

Chicago-referens (17:e uppl.)

Eilers, Lawrence J., och Dean M. Roosa. The Vascular Plants of Iowa: An Annotated Checklist and Natural History. Iowa City: University of Iowa Press, 1994.

MLA-referens (9:e uppl.)

Eilers, Lawrence J., och Dean M. Roosa. The Vascular Plants of Iowa: An Annotated Checklist and Natural History. University of Iowa Press, 1994.