ஐக்கிய அமெரிக்க வட்டாரங்களின் பட்டியல் (Tamil Wikipedia)

refsWebsite

Global rank Tamil rank

3^rd place

6^th place

45^th place

216^th place

books.google.com (Global: 3^rd place; Tamil: 6^th place)

"The most widely used regional definitions follow those of the U.S. Bureau of the Census." Seymour Sudman and Norman M. Bradburn, Asking Questions: A Practical Guide to Questionnaire Design (1982). Jossey-Bass: p. 205.
"Perhaps the most widely used regional classification system is one developed by the U.S. Census Bureau." Dale M. Lewison, Retailing, Prentice Hall (1997): p. 384. பன்னாட்டுத் தரப்புத்தக எண் 978-0-13-461427-4
"(M)ost demographic and food consumption data are presented in this four-region format." Pamela Goyan Kittler, Kathryn P. Sucher, Food and Culture, Cengage Learning (2008): p.475. பன்னாட்டுத் தரப்புத்தக எண் 9780495115410

United States Census Bureau, Geography Division. "Census Regions and Divisions of the United States" (PDF). Retrieved 2013-01-10.