APA (7th ed.) Citation

Potter, B., & Taylor, J. (1992). Letters to children. Frederick Warne ; Penguin Books.

Chicago Style (17th ed.) Citation

Potter, Beatrix, and Judy Taylor. Letters to Children. London, England : New York, N.Y.: Frederick Warne ; Penguin Books, 1992.

MLA (9th ed.) Citation

Potter, Beatrix, and Judy Taylor. Letters to Children. Frederick Warne ; Penguin Books, 1992.