APA (7th ed.) Citation

Ferguson & McHenry. (1967). The American system of government (9th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Ferguson and McHenry. The American System of Government. 9th ed. New York: McGraw-Hill, 1967.

MLA (8th ed.) Citation

Ferguson and McHenry. The American System of Government. 9th ed. McGraw-Hill, 1967.