Cita APA (7a ed.)

Nichols, J. P., & Nichols, R. F. (1939). The republic of the Unites States: A history. Appleton-Century.

Cita Chicago Style (17a ed.)

Nichols, Jeannette P., y Roy F. Nichols. The Republic of the Unites States: A History. Nueva York, NY: Appleton-Century, 1939.

Cita MLA (8a ed.)

Nichols, Jeannette P., y Roy F. Nichols. The Republic of the Unites States: A History. Appleton-Century, 1939.