APA (7th ed.) Citation

Tolkien, J. R. R. (1981). The Hobbit or there and back again (4a. ed.). Unwin Paperbacks.

Chicago Style (17th ed.) Citation

Tolkien, J. R. R. The Hobbit or There and Back Again. 4a. ed. Londres: Unwin Paperbacks, 1981.

MLA (9th ed.) Citation

Tolkien, J. R. R. The Hobbit or There and Back Again. 4a. ed. Unwin Paperbacks, 1981.