Cita APA (7a ed.)

Shull, A. F. (1951). Evolution (2nd edition.). McGraw Hill.

Cita Chicago Style (17a ed.)

Shull, A. Franklin. Evolution. 2nd edition. New York: McGraw Hill, 1951.

Cita MLA (8a ed.)

Shull, A. Franklin. Evolution. 2nd edition. McGraw Hill, 1951.