Georgiev Venelin & Longdom Publishing. Functions, Principles and Problems of the Security System.
Lua i Stíl Chicago (17ú heag.)Georgiev Venelin agus Longdom Publishing. Functions, Principles and Problems of the Security System.
Lua MLA (9ú heag.)Georgiev Venelin agus Longdom Publishing. Functions, Principles and Problems of the Security System.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.