APA (7th ed.) Citation

Geological Society of America, Decade of North American Geology Project, & Zoback, M. L. C. (1991). Stress map of North America. Geological Society of America.

Chicago Style (17th ed.) Citation

Geological Society of America, Decade of North American Geology Project, and Mary Lou C. Zoback. Stress Map of North America. Boulder, Colo.: Geological Society of America, 1991.

MLA (9th ed.) Citation

Geological Society of America, et al. Stress Map of North America. Geological Society of America, 1991.