Cita APA

Ferguson, J. H. M. (1963). The American sysytem of government (7th ed.). Mcgraw hill.

Chicago Edition Citation

Ferguson, John H McHenry. The American Sysytem of Government. 7th ed. NewYork: Mcgraw hill, 1963.

Cita MLA

Ferguson, John H McHenry. The American Sysytem of Government. 7th ed. Mcgraw hill, 1963.