Cita APA (7a ed.)

Freeman, E. A., & Green, J. R. (1870). History of Europe. American Book comp.

Cita Chicago Style (17a ed.)

Freeman, Edward A., y John Richard Green. History of Europe. New York [u.a.]: American Book comp, 1870.

Cita MLA (9a ed.)

Freeman, Edward A., y John Richard Green. History of Europe. American Book comp, 1870.