APA (7th ed.) Citation

Potter, B., Hartley, D., & Kirby-Parrish, L. (1914). All about Peter Rabbit. Cupples & Leon.

Chicago Style (17th ed.) Citation

Potter, Beatrix, Dick Hartley, and L. Kirby-Parrish. All About Peter Rabbit. New York: Cupples & Leon, 1914.

MLA (9th ed.) Citation

Potter, Beatrix, et al. All About Peter Rabbit. Cupples & Leon, 1914.