- Instituto Nacional de Estatística de Angola: https://www.ine.gov.ao
- Incubator Harvard University: https://gheli.harvard.edu
- Our World in Data: https://ourworldindata.org
- World Bank: https://data.worldbank.org
- African Development Bank Group: https://www.afdb.org/en
- The Oxford Poverty and Human Development Initiative (OPHI): https://ophi.org.uk
- UNPD: https://hdr.undp.org
- OPEC: https://www.opec.org/opec_web/en/index.htm
- World of Statistics: https://world-statistics.org
- The European Anti-Poverty Network (EAPN): https://www.eapn.eu
- African Evaluation Association: https://afrea.org
- International Gemological Institute (IGI): https://www.igi.org
- GEI: https://www.globalevaluationinitiative.org
- US BUREAU OF LABOR STATISTICS: https://www.bls.gov
- International Energy Agency (IEA Data and Statistics): https://www.iea.org
- World Diamond Council (WDC): https://www.worlddiamondcouncil.org
