APA

Davis H. E., . (1953). The Americas in history. New York: Ronald Press Co.

Chicago

Davis Harold Eugene, . 1953. The Americas in history. New York: Ronald Press Co.

Harvard

Davis H. E., . (1953). The Americas in history. New York: Ronald Press Co.

MLA

Davis Harold Eugene, . The Americas in history. New York: Ronald Press Co. 1953.