APA (7th ed.) Citation

GIBSON. (1989). 20th century warfare. Wayland Publ.

Chicago Style (17th ed.) Citation

GIBSON. 20th Century Warfare. East Sussex: Wayland Publ, 1989.

MLA (8th ed.) Citation

GIBSON. 20th Century Warfare. Wayland Publ, 1989.

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