Cita APA (7th ed.)

Wykes, D. (1987). A preface to Orwell. Longman.

Cita Chicago (17th ed.)

Wykes, David. A Preface to Orwell. London [u.a.]: Longman, 1987.

Cita MLA (8th ed.)

Wykes, David. A Preface to Orwell. Longman, 1987.