APA (7th ed.) Citation

Gray, R., & Argyle, C. Chronicle of the First World War. Facts on File.

Chicago Style (17th ed.) Citation

Gray, Randal, and Christopher Argyle. Chronicle of the First World War. New York u.a: Facts on File.

MLA (9th ed.) Citation

Gray, Randal, and Christopher Argyle. Chronicle of the First World War. Facts on File.