APA (7th ed.) Citation

George Orwell, Ian Angus, & Sonia Orwell. (1968). The collected essays, journalism, and letters of George Orwell. Penguin books.

Chicago Style (17th ed.) Citation

George Orwell, Ian Angus, and Sonia Orwell. The Collected Essays, Journalism, and Letters of George Orwell. Wardurg: Penguin books, 1968.

MLA (9th ed.) Citation

George Orwell, et al. The Collected Essays, Journalism, and Letters of George Orwell. Penguin books, 1968.