APA (7th ed.) Citation

Orwell, G. (1950). Nineteen eighty-four: A novel (First published 1949, reprinted 1950.). Secker & Warburg.

Chicago Style (17th ed.) Citation

Orwell, George. Nineteen Eighty-four: A Novel. First published 1949, reprinted 1950. London: Secker & Warburg, 1950.

MLA (9th ed.) Citation

Orwell, George. Nineteen Eighty-four: A Novel. First published 1949, reprinted 1950. Secker & Warburg, 1950.