APA (7th ed.) Citation

Potter, B. (1985). The tale of squirrel nutkin. Penguin Books.

Chicago Style (17th ed.) Citation

Potter, Beatrix. The Tale of Squirrel Nutkin. Londres: Penguin Books, 1985.

MLA (9th ed.) Citation

Potter, Beatrix. The Tale of Squirrel Nutkin. Penguin Books, 1985.