Cita APA

Ferguson, J. H., & Mchenry, D. E. (1967). The American system of government. New York: McGraw-Hill.

Chicago Style Citation

Ferguson, John H., i Dean E. Mchenry. The American System of Government. New York: McGraw-Hill, 1967.

Cita MLA

Ferguson, John H., i Dean E. Mchenry. The American System of Government. New York: McGraw-Hill, 1967.