The following sources were consulted in the preparation of the article “10 things people couldn’t believe were real when they visited the US.”
- Where the Sidewalks End: Pedestrian Risk and Material Mismatch in the American Suburbs
- Sugar in Bread: What You Need to Know
- National Household Travel Survey Daily Travel Quick Facts
- National Household Travel Survey — short trips analysis
- 3 Global Toilet Types You Should Know
- What is Walmart doing to guarantee responsible firearm sales?
- Dry America in the 21st Century