APA (7th ed.) Citation

Steinberg, D., & Smith, B. (2008). Sound off! Penguin Books Ltd.

Chicago Style (17th ed.) Citation

Steinberg, D.J, and Brian Smith. Sound off! London: Penguin Books Ltd, 2008.

MLA (9th ed.) Citation

Steinberg, D.J, and Brian Smith. Sound off! Penguin Books Ltd, 2008.