Bull, S. (2004). Encyclopedia of military technology and innovation. Greenwood Press.
Lua i Stíl Chicago (17ú heag.)Bull, Stephen. Encyclopedia of Military Technology and Innovation. Westport, Conn.: Greenwood Press, 2004.
Lua MLA (9ú heag.)Bull, Stephen. Encyclopedia of Military Technology and Innovation. Greenwood Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.