APA

Woodring P., . (1957). A fourth of a nation. New York: McGraw-Hill.

Chicago

Woodring Paul, . 1957. A fourth of a nation. New York: McGraw-Hill.

Harvard

Woodring P., . (1957). A fourth of a nation. New York: McGraw-Hill.

MLA

Woodring Paul, . A fourth of a nation. New York: McGraw-Hill. 1957.