Ann Mullen (2000-11-08). „Breaking the blue code”. Metro Times. Архивирано из оригинала 3. 6. 2020. г. Приступљено 2014-12-29.CS1 одржавање: Формат датума (веза)
Chin, Gabriel; Wells, Scott (1998). „The "Blue Wall of Silence" and "the Blue Curtain of Secrecy" as Evidence of Bias and Motive to Lie: A New Approach to Police Perjury”. University of Pittsburgh Law Review. 59: 233. SSRN1810012.
Ann Mullen (2000-11-08). „Breaking the blue code”. Metro Times. Архивирано из оригинала 3. 6. 2020. г. Приступљено 2014-12-29.CS1 одржавање: Формат датума (веза)
Chin, Gabriel; Wells, Scott (1998). „The "Blue Wall of Silence" and "the Blue Curtain of Secrecy" as Evidence of Bias and Motive to Lie: A New Approach to Police Perjury”. University of Pittsburgh Law Review. 59: 233. SSRN1810012.