APA (7th ed.) Citation

Taylor, A. J. P., & Mayer, S. L. (1974). History of World War I. Octopus Books ; Galahad Books.

Chicago Style (17th ed.) Citation

Taylor, A. J. P., and S. L. Mayer. History of World War I. London : New York, N.Y.: Octopus Books ; Galahad Books, 1974.

MLA (9th ed.) Citation

Taylor, A. J. P., and S. L. Mayer. History of World War I. Octopus Books ; Galahad Books, 1974.