APA (7th ed.) Citation

John H. Northrop, M. K. a. R. M. H. Crystalline enzymes. Columbia University Press.

Chicago Style (17th ed.) Citation

John H. Northrop, Moses Kuntz and Roger M. Herriott. Crystalline Enzymes. Columbia University Press.

MLA (8th ed.) Citation

John H. Northrop, Moses Kuntz and Roger M. Herriott. Crystalline Enzymes. Columbia University Press.

Warning: These citations may not always be 100% accurate.