APA Style

Greg., C., C., R, L. (2007.). An introduction to the causes of war : patterns of interstate conflict from World War I to Iraq. . United Kingdom: Rowman & Littlefield.

MLA Style

Greg., Cashman., C., Robinson, Leonard. "An introduction to the causes of war : patterns of interstate conflict from World War I to Iraq.". United Kingdom: Rowman & Littlefield, 2007.. หนังสือ (Book).