APA (7th ed.) Citation

Langley, A., Macdonald, F., & Walker, J. (2001). 500 things you should know about history. Miles Kelly Publishing Ltd..

Chicago Style (17th ed.) Citation

Langley, Andrew, Fiona Macdonald, and Jane Walker. 500 Things You Should Know About History. Essex: Miles Kelly Publishing Ltd., 2001.

MLA (9th ed.) Citation

Langley, Andrew, et al. 500 Things You Should Know About History. Miles Kelly Publishing Ltd., 2001.