APA (7th ed.) Citation

Berry, W. B. N., & Boucot, A. J. (1972). Correlation of the South American Silurian rocks. Geological Society of America.

Chicago Style (17th ed.) Citation

Berry, William B. N., and A. J. Boucot. Correlation of the South American Silurian Rocks. Boulder, Colo.]: Geological Society of America, 1972.

MLA (9th ed.) Citation

Berry, William B. N., and A. J. Boucot. Correlation of the South American Silurian Rocks. Geological Society of America, 1972.