Cita APA (7th ed.)
Ferguson, J. H., & McHenry, D. E. (1947). The American System of government: By John H. Ferguson and Dean E[ugene] M[a]cHenry. McGraw-Hill.
Cita Chicago (17th ed.)
Ferguson, John H., i Dean E. McHenry. The American System of Government: By John H. Ferguson and Dean E[ugene] M[a]cHenry. New York, London: McGraw-Hill, 1947.
Cita MLA (9th ed.)
Ferguson, John H., i Dean E. McHenry. The American System of Government: By John H. Ferguson and Dean E[ugene] M[a]cHenry. McGraw-Hill, 1947.
Atenció: Aquestes cites poden no estar 100% correctes.