Enke, S. (1967). Defense Management Stephen Enke. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Enke, Stephen. Defense Management Stephen Enke. Prentice-Hall, 1967.
Lua MLA (8ú heag.)Enke, Stephen. Defense Management Stephen Enke. Prentice-Hall, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.