Collier, P. (2000). Ethnicity, Politics and Economic Performance. Blackwell Publishing.
Lua i Stíl Chicago (17ú heag.)Collier, P. Ethnicity, Politics and Economic Performance. Blackwell Publishing, 2000.
Lua MLA (9ú heag.)Collier, P. Ethnicity, Politics and Economic Performance. Blackwell Publishing, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.