APA

Ferguson J. H., McHenry D. E., . (1968). Elements of American Government. New York: McGraw-Hill.

Chicago

Ferguson John Henry, McHenry Dean Eugene, . 1968. Elements of American Government. New York: McGraw-Hill.

Harvard

Ferguson J. H., McHenry D. E., . (1968). Elements of American Government. New York: McGraw-Hill.

MLA

Ferguson John Henry, McHenry Dean Eugene, . Elements of American Government. New York: McGraw-Hill. 1968.