APA (7th ed.) Citation

Roosa, D. M., Leoschke, M. J., & Eilers, L. J. (1989). Distribution of Iowa's endangered and threatened vascular plants. Iowa Department of Natural Resources.

Chicago Style (17th ed.) Citation

Roosa, Dean M., Mark J. Leoschke, and Lawrence J. Eilers. Distribution of Iowa's Endangered and Threatened Vascular Plants. [Des Moines, Iowa]: Iowa Department of Natural Resources, 1989.

MLA (9th ed.) Citation

Roosa, Dean M., et al. Distribution of Iowa's Endangered and Threatened Vascular Plants. Iowa Department of Natural Resources, 1989.