Cita APA (7th ed.)

Ferguson, J. H., & McHenry, D. E. (1947). The American system of government. s. n.

Cita Chicago (17th ed.)

Ferguson, John Henry, i Dean Eugene McHenry. The American System of Government. New York: s. n, 1947.

Cita MLA (9th ed.)

Ferguson, John Henry, i Dean Eugene McHenry. The American System of Government. s. n, 1947.