Cita APA (7a ed.)
Leopold, R. W. (1958). Problems in american history. Prentice-Hill.
Cita Chicago Style (17a ed.)
Leopold, Richard W. Problems in American History. New Jersey: Prentice-Hill, 1958.
Cita MLA (9a ed.)
Leopold, Richard W. Problems in American History. Prentice-Hill, 1958.
Precaución: Estas citas no son 100% exactas.