APA (7th ed.) Citation

Hoyt, E. P. (1987). U-boats: A pictorial history. McGraw-Hill.

Chicago Style (17th ed.) Citation

Hoyt, Edwin P. U-boats: A Pictorial History. New York: McGraw-Hill, 1987.

MLA (9th ed.) Citation

Hoyt, Edwin P. U-boats: A Pictorial History. McGraw-Hill, 1987.