APA (7th ed.) Citation

Minnesota Geological Survey, Geological Society of America. North-Central Section. Annual Meeting, & Balaban, N. (1987). Field trip guidebook for the Upper Mississippi valley, Minnesota, Iowa, and Wisconsin. Minnesota Geological Survey, University of Minnesota.

Chicago Style (17th ed.) Citation

Minnesota Geological Survey, Geological Society of America. North-Central Section. Annual Meeting, and Nancy Balaban. Field Trip Guidebook for the Upper Mississippi Valley, Minnesota, Iowa, and Wisconsin. St. Paul, Minn.: Minnesota Geological Survey, University of Minnesota, 1987.

MLA (9th ed.) Citation

Minnesota Geological Survey, et al. Field Trip Guidebook for the Upper Mississippi Valley, Minnesota, Iowa, and Wisconsin. Minnesota Geological Survey, University of Minnesota, 1987.