APA (7th ed.) Citation

Read, C. B., Mamay, S. H., & Keroher, G. C. (1964). Upper Paleozoic floral zones and floral provinces of the United States. U.S. Gov. Print. Off.

Chicago Style (17th ed.) Citation

Read, Charles B., Sergius H. Mamay, and Grace C. Keroher. Upper Paleozoic Floral Zones and Floral Provinces of the United States. Washington: U.S. Gov. Print. Off, 1964.

MLA (9th ed.) Citation

Read, Charles B., et al. Upper Paleozoic Floral Zones and Floral Provinces of the United States. U.S. Gov. Print. Off, 1964.