APA (7th ed.) Citation

Read, C. B., & Merriam, C. W. (1940). Pennsylvanian flora from central Oregon. American Journal of Science, 238, 107.

Chicago Style (17th ed.) Citation

Read, C. B., and C. W. Merriam. "Pennsylvanian Flora from Central Oregon." American Journal of Science 238 (1940): 107.

MLA (9th ed.) Citation

Read, C. B., and C. W. Merriam. "Pennsylvanian Flora from Central Oregon." American Journal of Science, vol. 238, 1940, p. 107.