Lua APA (7ú heag.)

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.

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