APA (7th ed.) Citation

Hibbert, A., Oxlade, C., & Pickering, J. (2001). Questions and answers: Mighty machines. Parragon.

Chicago Style (17th ed.) Citation

Hibbert, Adam, Chris Oxlade, and James Pickering. Questions and Answers: Mighty Machines. United Kingdom: Parragon, 2001.

MLA (9th ed.) Citation

Hibbert, Adam, et al. Questions and Answers: Mighty Machines. Parragon, 2001.