APA (7th ed.) Citation

Keatts, H. C., & Farr, G. (1986). U-boats. American Merchant Marine Museum Pr.

Chicago Style (17th ed.) Citation

Keatts, Henry C., and George Farr. U-boats. Kings Point, NY: American Merchant Marine Museum Pr, 1986.

MLA (9th ed.) Citation

Keatts, Henry C., and George Farr. U-boats. American Merchant Marine Museum Pr, 1986.

Warning: These citations may not always be 100% accurate.