APA Edition Citation

Sumner, J. B., & Somers, G. F. (1947). Chemistry and methods of enzymes (2 ed.). Academic Press Inc..

Chicago Edition Citation

Sumner, James B., and G Fred Somers. Chemistry and Methods of Enzymes. 2 ed. New York: Academic Press Inc., 1947.

MLA Edition Citation

Sumner, James B., and G Fred Somers. Chemistry and Methods of Enzymes. 2 ed. Academic Press Inc., 1947.