APA Style

Cushman, R, M. et al (1980). Sourcebook of Hydrologic and Ecological Features: Water Resource Regions of the Conterminous United States . Michigan: Ann Arbor Science.

MLA Style

Cushman, Robert, M.. et al. "Sourcebook of Hydrologic and Ecological Features: Water Resource Regions of the Conterminous United States". Michigan: Ann Arbor Science, 1980. Text.