APA (7th ed.) Citation

Hart, P. (2003). The I.R.A at war: 1916-1923. Oxford University Press.

Chicago Style (17th ed.) Citation

Hart, Peter. The I.R.A at War: 1916-1923. Oxford: Oxford University Press, 2003.

MLA (9th ed.) Citation

Hart, Peter. The I.R.A at War: 1916-1923. Oxford University Press, 2003.