APA (7th ed.) Citation

Gibson, L., & Harper, J. E. T. (1934). The riddle of Jutland: An authentic history. Coward-McCann.

Chicago Style (17th ed.) Citation

Gibson, Langhorne, and J. E. T. Harper. The Riddle of Jutland: An Authentic History. New York: Coward-McCann, 1934.

MLA (8th ed.) Citation

Gibson, Langhorne, and J. E. T. Harper. The Riddle of Jutland: An Authentic History. Coward-McCann, 1934.