- "The World Factbook: ALBANIA." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: ANDORRA." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: BOSNIA AND HERZEGOVINA." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: CROATIA." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: GREECE." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: ITALY." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: MONTENEGRO." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: MALTA." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: PORTUGAL." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "The World Factbook: SAN MARINO." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- Jāhāna, Selima. Work for Human Development. N.p.: n.p., n.d. Web.
- "Contact CIA." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "Montenegro." OEC - Montenegro (MNE) Exports, Imports, and Trade Partners. N.p., n.d. Web. 06 Dec. 2016.
- Local, The. "Spain 'won't Send Troops to Iraq at This Stage'" The Local. N.p., 04 Sept. 2014. Web. 06 Dec. 2016.
- "The World Factbook: SERBIA." Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 06 Dec. 2016.
- "European Economic Guide." The Economist. The Economist Newspaper, 2016. Web. 06 Dec. 2016.
- "The Shadow Economy in Europe, 2013 - Financial Institutions Featured Article - A.T. Kearney - A.T. Kearney." The Shadow Economy in Europe, 2013 - Financial Institutions Featured Article - A.T. Kearney. N.p., n.d. Web. 06 Dec. 2016.