An intergovernmental organization (IGO) is a structure based on a formal instrument of agreement between nations (e.g. the United Nations, the EU).
A non-governmental organization (NGO)
is a group whose members are individuals or associations (e.g. the International Committee of the Red Cross).
Links:
[1] http://www.staff.city.ac.uk/p.willetts/CS-NTWKS/NGO-ART.HTM
[2] http://www.uia.be/
[3] http://libguides.northwestern.edu/IGO
[4] http://libguides.northwestern.edu/ForeignGovernmentList
[5] http://library.duke.edu/research/subject/guides/ngo_guide/
[6] http://www.adb.org/
[7] http://www.centerforunreform.org/
[8] http://www.cisstat.com/
[9] http://www.coe.int/
[10] http://europa.eu/
[11] http://www.fao.org/
[12] http://www.gemconsortium.org/
[13] http://www.iadb.org/
[14] http://www.iccwbo.org/
[15] http://www.ilo.org/
[16] http://www.imf.org/
[17] http://www.imo.org/
[18] http://www.iom.int/
[19] http://www.oas.org/
[20] http://www.oapecorg.org/
[21] http://www.oecd.org/
[22] http://www.opec.org/
[23] http://www.paho.org/
[24] http://www.un.org/
[25] https://unp.un.org/
[26] http://www.unicef.org/
[27] http://www.unesco.org/
[28] http://www.unhabitat.org/
[29] http://www.unu.edu/unupress/
[30] http://www.who.int/
[31] http://www.worldbank.org/
[32] http://www.wmo.ch/
[33] http://www.worldpeacefoundation.org/
[34] http://www.wto.org/
[35] http://www.world-tourism.org/
[36] http://www.library.northwestern.edu/related-pages/international-documents-collection