Gurstelle, W. (2004). The art of the catapult: Build Greek ballistae, Roman onagers, English trebuchets, and more ancient artillery. Chicago Review Press.
Chicago-Zitierstil (17. Ausg.)Gurstelle, William. The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery. Chicago, Ill: Chicago Review Press, 2004.
MLA-Zitierstil (9. Ausg.)Gurstelle, William. The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery. Chicago Review Press, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.