Richardson, K. (2009). English for Law Enforcement: Teacher's Book. Macmillan.
Lua i Stíl Chicago (17ú heag.)Richardson, Karen. English for Law Enforcement: Teacher's Book. Oxford: Macmillan, 2009.
Lua MLA (8ú heag.)Richardson, Karen. English for Law Enforcement: Teacher's Book. Macmillan, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.