APA aipamena

Collier, P., & Hoeffler, A. (2005). Democracy and Resource Rents. GPRG.

Chicago Style aipamena

Collier, P., and A. Hoeffler. Democracy and Resource Rents. GPRG, 2005.

MLA aipamena

Collier, P., and A. Hoeffler. Democracy and Resource Rents. GPRG, 2005.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.