Cita APA (7th ed.)

Gutfreund, H. (1965). An introduction to the study of enzymes. Blackwell Scientific Publishing.

Cita Chicago (17th ed.)

Gutfreund, H. An Introduction to the Study of Enzymes. Oxford: Blackwell Scientific Publishing, 1965.

Cita MLA (9th ed.)

Gutfreund, H. An Introduction to the Study of Enzymes. Blackwell Scientific Publishing, 1965.