APA (7th ed.) Citation

Ferguson, J. H., & McHenry, D. E. (1961). The American system of government (6th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Ferguson, John Henry, and Dean Eugene McHenry. The American System of Government. 6th ed. New York [etc.]: McGraw-Hill, 1961.

MLA (9th ed.) Citation

Ferguson, John Henry, and Dean Eugene McHenry. The American System of Government. 6th ed. McGraw-Hill, 1961.