APA (7th ed.) Citation

Hennessy & McKercher. (2003). War in the twentieth century: Reflections at century's end. Praeger Publishers.

Chicago Style (17th ed.) Citation

Hennessy and McKercher. War in the Twentieth Century: Reflections at Century's End. London: Praeger Publishers, 2003.

MLA (8th ed.) Citation

Hennessy and McKercher. War in the Twentieth Century: Reflections at Century's End. Praeger Publishers, 2003.