APA

Purdy H. L., . (1946). Corporate concentration and public policy. New York: Prentice-Hall.

Chicago

Purdy Harry L, . 1946. Corporate concentration and public policy. New York: Prentice-Hall.

Harvard

Purdy H. L., . (1946). Corporate concentration and public policy. New York: Prentice-Hall.

MLA

Purdy Harry L, . Corporate concentration and public policy. New York: Prentice-Hall. 1946.