CIA - The World Factbook: Gibraltar
- Features map and brief descriptions of the geography, people, government, economy, communications, transportation, military and transnational issues.
- https://www.cia.gov/library/publications/the-world-factbook/geos/gi.html

Wikipedia - Gibraltar
- Hyperlinked encyclopedia article covers the country's history, government and politics, geography, economy, demographics, language and culture.
- http://en.wikipedia.org/wiki/Gibraltar