Freidel, F. (1960). America in the twentieth century. Alfred A koope.
Citación estilo ChicagoFreidel, Frank. America in the Twentieth Century. New York: Alfred A koope, 1960.
Cita MLAFreidel, Frank. America in the Twentieth Century. Alfred A koope, 1960.
Warning: These citations may not always be 100% accurate.