Cita APA (7a ed.)

Gay, P., & Webb, R. (1973). Modern Europe to 1815. Harper & Row.

Cita Chicago Style (17a ed.)

Gay, Peter, y R.K Webb. Modern Europe to 1815. New York [etc.]: Harper & Row, 1973.

Cita MLA (9a ed.)

Gay, Peter, y R.K Webb. Modern Europe to 1815. Harper & Row, 1973.