Cita APA (7th ed.)

Ferguson, J. H., & McHenry, D. E. (1971). The American Federal Government (11th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Ferguson, John Henry, i Dean Eugene McHenry. The American Federal Government. 11th ed. New York: McGraw-Hill, 1971.

Cita MLA (8th ed.)

Ferguson, John Henry, i Dean Eugene McHenry. The American Federal Government. 11th ed. McGraw-Hill, 1971.