20 years of Gmail: How it went from April Fool's to dominating email - Android Police
- 20 years of Gmail: How it went from April Fool's to dominating email Android Police
- 20 years of Gmail The Verge
- On April Fool's Day, Google's Gmail celebrates its 20th anniversary The Associated Press
- Does Your Business Really Need a Marketing Stunt on April Fools' Day? Inc.
- Gmail turns 20 today. Read the launch memo. Business Insider