Cita APA (7a ed.)

Baldwin, E., & Gowland Hopkins, F. (1940). An introduction to comparative Biochemistry (2nd ed.). University Press.

Cita Chicago Style (17a ed.)

Baldwin, Ernest, y Frederick Gowland Hopkins. An Introduction to Comparative Biochemistry. 2nd ed. Cambridge: University Press, 1940.

Cita MLA (9a ed.)

Baldwin, Ernest, y Frederick Gowland Hopkins. An Introduction to Comparative Biochemistry. 2nd ed. University Press, 1940.