Episode Source Material:
- Best Places - Donut Data Set
- Home / Rankings / Top Donut Cities
- A Dozen Things You Didn't Know About Dunkin' | Dunkin'
- The Salvation Army USA Blog - The Salvation Army Celebrates National Donut Day!
- National Donut Day
- Doughnut Girls: The Women Who Fried Donuts and Dodged Bombs on the Front Lines of World War I - World War I Centennial.
- Donut Day History - The Salvation Army Metropolitan Division
- The Women Who Fried Donuts and Dodged Bombs on the Front Lines of WWI