APA (7th ed.) Citation

Boyer, P. D., Krebs, E. G., & Sigman, D. S. (1970). The Enzymes (Third edition.). Academic Press.

Chicago Style (17th ed.) Citation

Boyer, Paul D., Edwin G. Krebs, and D. S. Sigman. The Enzymes. Third edition. New York: Academic Press, 1970.

MLA (9th ed.) Citation

Boyer, Paul D., et al. The Enzymes. Third edition. Academic Press, 1970.