• The U.S. State Department’s Business Visa Center
• The U.S. State Department’s Safe Traveler Enrollment Program(STEP)
• The U.S. State Department’s  Consular Information Sheet on Costa Rica. The Consular Information Sheet has useful information for U.S. citizens traveling to Costa Rica.
• The U.S. State Department’s Guidance on “A Safe Trip Abroad”
• Embassy of Costa Rica in the United States