APA Edition Citation

Northrop, J. H., & Kunitz, M. (1948). Crystalline enzymes. Columbia University Press.

Chicago Edition Citation

Northrop, John H., and Moses Kunitz. Crystalline Enzymes. New York: Columbia University Press, 1948.

MLA Edition Citation

Northrop, John H., and Moses Kunitz. Crystalline Enzymes. Columbia University Press, 1948.