APA (7th ed.) Citation

Houlihan, M. (1974). World War I : trench warfare / by M. Houlihan: Trench warfare. Ward Lock.

Chicago Style (17th ed.) Citation

Houlihan, M. World War I : Trench Warfare / by M. Houlihan: Trench Warfare. Ward Lock, 1974.

MLA (9th ed.) Citation

Houlihan, M. World War I : Trench Warfare / by M. Houlihan: Trench Warfare. Ward Lock, 1974.

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