Style de citation APA (7e éd.)

Herzberg, R., & Pearson, J. (2001). The Guide to Iowa's State Preserves. University of Iowa Press for the Iowa Dept. of Natural Resources.

Style de citation Chicago (17e éd.)

Herzberg, Ruth, et John Pearson. The Guide to Iowa's State Preserves. Iowa City: University of Iowa Press for the Iowa Dept. of Natural Resources, 2001.

Style de citation MLA (8e éd.)

Herzberg, Ruth, et John Pearson. The Guide to Iowa's State Preserves. University of Iowa Press for the Iowa Dept. of Natural Resources, 2001.