Alexander, J. Security Systems and Nonlethal Technologies for Law Enforcement. SPIE Digital Library.
Citazione stile Chigago Style (17a edizione)Alexander, John. Security Systems and Nonlethal Technologies for Law Enforcement. SPIE Digital Library.
Citatione MLA (9a ed.)Alexander, John. Security Systems and Nonlethal Technologies for Law Enforcement. SPIE Digital Library.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.