Collier, P., & Hoeffler, A. (2005). Democracy and Resource Rents. GPRG.
Lua i Stíl Chicago (17ú heag.)Collier, P., agus A. Hoeffler. Democracy and Resource Rents. GPRG, 2005.
Lua MLA (9ú heag.)Collier, P., agus A. Hoeffler. Democracy and Resource Rents. GPRG, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.