APA (7th ed.) Citation

Willcox, W. F. (1940). Studies in American demography. Cornell university press.

Chicago Style (17th ed.) Citation

Willcox, Walter F. Studies in American Demography. Ithaca, N. Y.: Cornell university press, 1940.

MLA (9th ed.) Citation

Willcox, Walter F. Studies in American Demography. Cornell university press, 1940.