Cita APA (7th ed.)

Trevelyan, G. M. (1947). A reader's guide: Biography. Cambridge Univ. Press.

Cita Chicago (17th ed.)

Trevelyan, G. M. A Reader's Guide: Biography. London [u.a.]: Cambridge Univ. Press, 1947.

Cita MLA (8th ed.)

Trevelyan, G. M. A Reader's Guide: Biography. Cambridge Univ. Press, 1947.