Cita APA (7a ed.)

Gustavson, C. G. (1955). A Preface to History. McGraw-Hill.

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

Gustavson, Carl G. A Preface to History. McGraw-Hill, 1955.