APA (7th ed.) Citation

Sumner, J. B., & Somers, G. F. (1953). Chemistry and methods of enzymes (3d ed., rev. and enl.). Academic Press.

Chicago Style (17th ed.) Citation

Sumner, James Batcheller, and George Frederick Somers. Chemistry and Methods of Enzymes. 3d ed., rev. and enl. New York: Academic Press, 1953.

MLA (9th ed.) Citation

Sumner, James Batcheller, and George Frederick Somers. Chemistry and Methods of Enzymes. 3d ed., rev. and enl. Academic Press, 1953.