APA (7th ed.) Citation

Eckhardt, W. (1992). Civilizations, empires and wars: A quantitative history of war. MacFarland.

Chicago Style (17th ed.) Citation

Eckhardt, William. Civilizations, Empires and Wars: A Quantitative History of War. Jefferson, NC u.a: MacFarland, 1992.

MLA (9th ed.) Citation

Eckhardt, William. Civilizations, Empires and Wars: A Quantitative History of War. MacFarland, 1992.

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