APA (7th ed.) Citation

Downing, E. R. (1918). The third and fourth generation: An introduction to heredity. The University of Chicago press.

Chicago Style (17th ed.) Citation

Downing, Elliot Rowland. The Third and Fourth Generation: An Introduction to Heredity. Chicago, Ill.: The University of Chicago press, 1918.

MLA (9th ed.) Citation

Downing, Elliot Rowland. The Third and Fourth Generation: An Introduction to Heredity. The University of Chicago press, 1918.