Cita APA

Gustavson, C. G., & Gustavson, C. G. (1955). A preface to history. New York, New York: McGraw-Hill.

Citación estilo Chicago

Gustavson, Carl G., y Carl G. Gustavson. A Preface to History. New York, New York: McGraw-Hill, 1955.

Cita MLA

Gustavson, Carl G., y Carl G. Gustavson. A Preface to History. New York, New York: McGraw-Hill, 1955.