Cita APA (7th ed.)

Patterson, J. T. (1976). America in the twentieth century. Harcourt.

Cita Chicago (17th ed.)

Patterson, James T. America in the Twentieth Century. New York: Harcourt, 1976.

Cita MLA (9th ed.)

Patterson, James T. America in the Twentieth Century. Harcourt, 1976.