Gallup, J. L., Gaviria, A., & Lora, E. (2003). Is geography destinyn: Lessons from Latin America. Inter-American Development Bank.
Lua i Stíl Chicago (17ú heag.)Gallup, John Luke, Alejandro Gaviria, agus Eduardo Lora. Is Geography Destinyn: Lessons from Latin America. Washington, D.C: Inter-American Development Bank, 2003.
Lua MLA (9ú heag.)Gallup, John Luke, et al. Is Geography Destinyn: Lessons from Latin America. Inter-American Development Bank, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.