Citazione Stile APA (7a Edizione)
Nieman, D. G. (1991). Promises to keep: African-Americans and the constitutional order, 1776 to the present. Oxford University.
Citazione stile Chigago Style (17a edizione)
Nieman, Donald G. Promises to Keep: African-Americans and the Constitutional Order, 1776 to the Present. New York: Oxford University, 1991.
Citatione MLA (9a ed.)
Nieman, Donald G. Promises to Keep: African-Americans and the Constitutional Order, 1776 to the Present. Oxford University, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.