Lawrence, F. B. (2005). ERP in distribution. Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Lawrence, F. Barry. ERP in Distribution. Thomson Learning, 2005.
Lua MLA (8ú heag.)Lawrence, F. Barry. ERP in Distribution. Thomson Learning, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.