Cita APA (7th ed.)
Nieman, D. G. (1991). Promises to keep: African-Americans and the constitutional order, 1776 to the present. Oxford University.
Cita Chicago (17th ed.)
Nieman, Donald G. Promises to Keep: African-Americans and the Constitutional Order, 1776 to the Present. New York: Oxford University, 1991.
Cita MLA (9th ed.)
Nieman, Donald G. Promises to Keep: African-Americans and the Constitutional Order, 1776 to the Present. Oxford University, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.