APA (7th ed.) Citation

Beesly, P. (1982). Room 40: British naval intelligence 1914-18 (1st American ed.). Harcourt Brace Jovanovich.

Chicago Style (17th ed.) Citation

Beesly, Patrick. Room 40: British Naval Intelligence 1914-18. 1st American ed. San Diego: Harcourt Brace Jovanovich, 1982.

MLA (9th ed.) Citation

Beesly, Patrick. Room 40: British Naval Intelligence 1914-18. 1st American ed. Harcourt Brace Jovanovich, 1982.