Cita APA (7a ed.)
(1994). American history. Cowles History Group, a division of Cowles Magazines.
Cita Chicago Style (17a ed.)
American History. Harrisburg, PA: Cowles History Group, a division of Cowles Magazines, 1994.
Cita MLA (9a ed.)
American History. Cowles History Group, a division of Cowles Magazines, 1994.
Precaución: Estas citas no son 100% exactas.